Add OSX ignore file
Add third-party libraries: ParseLoginUI and Facebook SDK
Add a login screen using ParseLoginUI
Merge remote-tracking branch 'origin/master' into sign-in

Conflicts:
	res/values/strings.xml
	src/org/missionassetfund/apps/android/MAFApplication.java
	src/org/missionassetfund/apps/android/activities/MainActivity.java
Fix a strange Parse user when instantiate the User object
Add a temp logo
Remove app_config_sample.xml
Code format
Merge pull request #18 from CodePath-MAF/sign-in

Finished formatting. Merging the pull.