PLAT-6369 - Added new snapshot link classes
PLAT-6369 - Added database changes required to add snapshot type
PLAT-6369 - Added database changes required to add snapshot type
PLAT-6369 - Added database changes required to add snapshot type

Addressed review comments
PLAT-6369 - Added database changes required to add snapshot type

Addressed review comments
Merge pull request #36 from OpenGamma/topic/PLAT-6369

Merge PLAT-6369 Snapshot master changes