Update AeroGear Android section to 1.3.1
Update AeroGear Android download link to 1.3.1
Update AeroGear Android JavaDoc to 1.3.1
Merge branch 'android_release_1_3_1'
Added How To Build AeroGear Android
Removed unecessary bash command
Update non-maven/gradle title
Merge branch 'root_android_document'