Added private files
Merge pull request #356 from chrisschaub/7.x-1.x

Added private files
#356. Add an else if and simplify public vs. private filepath determination.
Update binary.
#356. Add 'else if' instead of 'if' to drupalgap_image_path().
update binary.
Merge branch '7.x-1.x' into 7.x-1.x-issue-354
More improvements towards exposed filters feature.