Merge pull request #183 from jeffreythomas/dev

PDI-11158 - Build re-usable Browse widget
[PDI-11555] Add generic utility methods to traverse TreeBrowserModel and RepositoryFileTreeDto
Merge pull request #184 from bytekast/PDI-11555

[PDI-11555] Add generic utility methods to traverse TreeBrowserModel and RepositoryFileTreeDto
[PDI-11158] Fixed a bug in the folderBrowser where it was assuming the existence of children at every level.
Merge pull request #185 from rfellows/AngularDirectives

[PDI-11158] Fixed a bug in the folderBrowser where it was assuming the existence of children at every level.
[PDI-11158] Adding a spinner to the folderBrowser
Merge pull request #187 from rfellows/AngularDirectives

[PDI-11158] Adding a spinner to the folderBrowser
PDI-11158 - Build re-usable Browse widget

Added some WIP methods to controller for static folder adding.  Need to update these when rest service is wired in.