Docs: Fixing grammar issues in Source Overview text
Bug: 9782335
Staging location: http://claym.mtv.corp.google.com:8085/source/index.html

Change-Id: Id3dfcf148f01300decc95131bdd68c2937c45a9f

Conflicts:
	src/source/faqs.jd
diff --git a/src/source/roles.jd b/src/source/roles.jd
index 7f2258b..44eeae4 100644
--- a/src/source/roles.jd
+++ b/src/source/roles.jd
@@ -33,46 +33,46 @@
 questions, contribute patches, report bugs, look at submitted patches, and use
 the tools. To get started with the Android code, see <a href="{@docRoot}source/contributing.html">Contributing</a>.</p>
 <h2 id="contributor">Contributor</h2>
-<p>A "Contributor" is anyone making contributions to the AOSP source code,
-including both employees of Google or other companies, as well as external
-developers who are contributing to Android on their own behalf.  There is no
-distinction between Contributors who are employed by Google, and those who are
-not: all engineers use the same tools (git, repo, and gerrit), 
+<p>"Contributors" are those making contributions to the AOSP source code,
+including both employees of Google or other companies, as well as individual
+developers who are contributing to Android on their own behalf. There is no
+distinction between contributors who are employed by Google and those who are
+not; all engineers use the same tools (git, repo, and gerrit),
 follow the same code review process, and are subject
 to the same requirements on code style and so on.</p>
 <h2 id="developer">Developer</h2>
-<p>A "Developer" is an engineer writing applications that run on Android
-devices. There is, of course, no difference in skillset between a "Developer"
-and a "Contributor", but AOSP uses "Developer" to distinguish between
-engineers using the platform and those contributing to it. Developers are
-(along with end users) the "customers" of the platform that the Contributors
-create. As such, we talk about Developers a lot, though this isn't technically
+<p>"Developers" are engineers writing applications that run on Android
+devices. There is often little difference in skillset between a developer
+and a contributor. But AOSP uses "developer" to distinguish between
+engineers using the platform and those contributing to it. Developers
+(along with users) are the "customers" of the platform the contributors
+create. As such, we talk about developers a lot, though this isn't technically
 a separate role in the AOSP per se.</p>
 <h2 id="verifier">Verifier</h2>
 <p>"Verifiers" are responsible for testing change requests. After individuals
 have submitted a significant amount of high-quality code to the project, the
-Project Leads might invite them to become Verifiers. <em>Note: at this
-time, generally Verifiers are the same as Approvers.</em></p>
+project leads might invite them to become verifiers. <em>Note: at this
+time, verifiers act similarly to approvers.</em></p>
 <h2 id="approver">Approver</h2>
 <p>"Approvers" are experienced members of the project who have demonstrated their
 design skills and have made significant technical contributions to the
-project. In the code-review process, an Approver decides whether to include or
-exclude a change. Project Leads (who are typically employed by Google) choose
-the Approvers, sometimes promoting to this position Verifiers who have
+project. In the code-review process, an approver decides whether to include or
+exclude a change. Project leads (who are typically employed by Google) choose
+the approvers, sometimes promoting to this position verifiers who have
 demonstrated their expertise within a specific project.</p>
-<h2 id="project-leads">Project Leads</h2>
+<h2 id="project-leads">Project Lead</h2>
 <p>Android consists of a number of sub-projects; you can see these in the git
-repository, as individual .git files. Tech Leads are senior Contributors who
-oversee the engineering for individual Android projects. Typically these tech
-leads will be Google employees.  A Project Lead for an individual project is
+repository as individual .git files. "Project leads" are senior contributors who
+oversee the engineering for individual Android projects. Typically these project
+leads are Google employees. A project lead for an individual project is
 responsible for the following:</p>
 <ul>
 <li>
-<p>Lead all technical aspects of the project; for example, the project roadmap, 
-  development, release cycles, versioning, and QA.</p>
+<p>Lead all technical aspects of the project, including the project roadmap,
+  development, release cycles, versioning, and quality assurance (QA).</p>
 </li>
 <li>
-<p>Ensure that the project is QA-ed in time for scheduled Android platform
+<p>Ensure the project is tested by QA in time for scheduled Android platform
   releases.</p>
 </li>
 <li>