add license notice to all java source files
comments for LandingActivity
Merge branch 'develop' into feature/code-style
missing/inaccurate docstring cleanup
code cleanup in PlaylistActivity
remove Rainwave.showError() and fix bad exception logging
do a better job handling errors in Session
clean up Handlers
remove Rainwave.reorderSongs()
put utility code in class Utility; remove unneeded constants
accidentally a word
add license to Utility.java
remove Content-Language header

The API is language-agnostic when it comes to client body content.
remove useless code
Merge branch 'feature/code-style' into develop