Fixed layout

Aligned the group title with the child data.  Shifted the group title to the right of the indicator.
Implemented a custom indicator and improved layout of the ExpandableListView

Created a custom indicator as a drawable.  The image used was the Android drawable expander_open_holo_light.9.png taken from the project directory External Libraries/Android 4.2.2 Platform/res/drawable-xhdpi.  It couldn't be located through the filesystem.

Improved layout spacing for the group and children by adding padding.
Merge branch 'refs/heads/develop'