Added messages API functionality.

SQL importable files are included, but unsure which is correct so needs to be corrected.
Updated SQL
Mostly done with comments. Available at "/comments" Performs basic CRUD.
Pending some testing and client-integration changes.

Please verify the SQL file is correct before merging, the size seems to have almost doubled. Maybe too much being exported.
Fixed Full updates (@PUT)
-full update can be used to set values to null
Merge remote-tracking branch 'origin/VolunteerApp_Carl' into
VolunteerApp