add file and associated data structures
add File response handler classes
add methods for getting current user files
add @Expose annotations, constructors

only kind, type, name, and public are used when creating a file.
add file and associated data structures
add File response handler classes
add methods for getting current user files
add @Expose annotations, constructors

only kind, type, name, and public are used when creating a file.
Merge branch 'features/File' of github.com:alwaysallthetime/ADNLib into features/File

Conflicts:
	ADNLibModule/src/main/java/com/alwaysallthetime/adnlib/AppDotNetClient.java
Merge branch 'features/File'

file creation not yet implemented, but we can do that later.