Fixes content_created_at and content_modified_at by moving them into JSON value being sent up with the request with the METADATA key.
Removed println's
Added support to delete a specific version of a file.
Removed TODO comment.
Fixed the param names for javadoc
Merge branch 'master' of github.com:raj-saxena/box-java-sdk-v2
Changes for 1)Adding collaboration for a group 2)Promoting an old version of files as current.
Merge branch 'master' of github.com:box/box-java-sdk-v2
Update README with deprecation warning
Add "is_externally_owned" field to BoxFolder

This field is true if the folder is collabed from another enterprise.
Merge pull request #230 from box/add_is_externally_owned_field

Add "is_externally_owned" field to BoxFolder
Takes IAuthData to authenticate, instead of using concrete class of IAuthData.
Merge pull request #233 from box/iauthdata

Takes IAuthData to authenticate, instead of using concrete class of IAut...
update version
Merge pull request #234 from box/version

update version
Merge pull request #220 from raj-saxena/master

Changes for 1) Deletion of a particular version of file. 2) Adding collaboration for a group. 3) Promoting an old version of files as current.
Merge pull request #219 from ritikm/fix-content-created-and-modified-at

Fix content_created_at and content_modified_at
update version
Merge pull request #235 from box/version

update version
Resolved conflicts