Alias rules properties names update

android-tools change to android.tools.dir
sdk-folder to sdk.dir
resource-dir to resource.dir
out-package to out.package
Some minor style changes introduced.
diff --git a/scripts/alias_rules.xml b/scripts/alias_rules.xml
index bc7de7c..18b978e 100644
--- a/scripts/alias_rules.xml
+++ b/scripts/alias_rules.xml
@@ -1,22 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project name="alias_rules" default="package">
 
-    <!-- No user servicable parts below. -->
+    <!-- No user serviceable parts below. -->
 
     <!-- Input directories -->
-    <property name="resource-dir" value="res" />
+    <property name="resource.dir" value="res" />
 
     <!-- The final package file to generate -->
-    <property name="out-package" value="${ant.project.name}.apk" />
+    <property name="out.package" value="${ant.project.name}.apk" />
 
     <!-- Tools -->
-    <condition property="aapt" value="${android-tools}/aapt.exe" else="${android-tools}/aapt" >
-        <os family="windows"/>
+    <condition property="aapt" value="${android.tools.dir}/aapt.exe" else="${android.tools.dir}/aapt">
+        <os family="windows" />
     </condition>
-    <condition property="adb" value="${android-tools}/adb.exe" else="${android-tools}/adb" >
-        <os family="windows"/>
+    <condition property="adb" value="${android.tools.dir}/adb.exe" else="${android.tools.dir}/adb">
+        <os family="windows" />
     </condition>
-    <property name="android-jar" value="${sdk-folder}/android.jar" />
+    <property name="android.jar" value="${sdk.dir}/android.jar" />
 
     <!-- Rules -->
 
@@ -29,11 +29,11 @@
             <arg value="-M" />
             <arg value="AndroidManifest.xml" />
             <arg value="-S" />
-            <arg value="${resource-dir}" />
+            <arg value="${resource.dir}" />
             <arg value="-I" />
-            <arg value="${android-jar}" />
+            <arg value="${android.jar}" />
             <arg value="-F" />
-            <arg value="${out-package}" />
+            <arg value="${out.package}" />
         </exec>
     </target>
 
@@ -45,7 +45,7 @@
         <echo>Sending package to default emulator...</echo>
         <exec executable="${adb}" failonerror="true">
             <arg value="install" />
-            <arg value="${out-package}" />
+            <arg value="${out.package}" />
         </exec>
     </target>