add the standard HelloWorld sample app as a gradle subproject. fixes #14
remove unused/dead code
fix spacing issues
implement error handing for HttpClient
Edits to Javadoc comments.
Edits to the main readme file for the 2.2 release.
Ignore Mac .DS_Store files.
Javadoc generated reference.
Docs corrections.
Fix for https://github.com/opentok/Opentok-Java-SDK/issues/34
(Docs corrections)
Docs correction.
fixes #36, stop archive URI was incorrect
add license file and remove extraneous headers from source files
adds contribution guidelines
adds developer guidlines, still incomplete
Merge branch 'jeffswartz-v2.2-docs' into aoberoi-modernization

Conflicts:
	src/main/java/com/opentok/TokenOptions.java
documentation generation tasks
change p2p to media mode
fix bug with list archives when using a count
clean up HelloWorld sample