This should be a complete fix and tests for #27

* Added IWriteableVClock interface to RiakObject
* Added tests for IWriteableVClock interface
* Added tests to ensure that we can force siblings through existing interfaces without using vclocks
Formatting adjustments and release notes

* Fixed up a few formatting issues.
* Added some details of the fix to the release notes.
Merge branch 'feature/VclockSupport' into develop

Conflicts:
	RELEASE_NOTES.md