Fix the front page building issue on Ubuntu 12.04

See http://daringfireball.net/projects/markdown/syntax#html

Note that Markdown formatting syntax is not processed within block-level
HTML tags. E.g., you can’t use Markdown-style *emphasis* inside an HTML block.

Python-Markdown conforms to the syntax rule above since version 2.1

This change moves the inside markdown text as the separate files.

Change-Id: I0b88d5c93836f9ee5c35cbeda87b11f2944b7662
diff --git a/src/index-intro.md b/src/index-intro.md
new file mode 100644
index 0000000..963a84d
--- /dev/null
+++ b/src/index-intro.md
@@ -0,0 +1,28 @@
+<!--
+   Copyright 2013 The Android Open Source Project 
+
+   Licensed under the Apache License, Version 2.0 (the "License"); 
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+-->
+
+Here you can find the information and source code you need to build an
+Android-compatible device.
+
+Android is an open-source software stack for mobile devices, and a
+corresponding open-source project led by Google. We created Android in
+response to our own experiences launching mobile apps. We wanted to make
+sure that there was no central point of failure, so that no industry player
+can restrict or control the innovations of any other.  That's why we
+created Android, and made its source code open.
+
+[Learn more »](about/index.html)
+