Initial commit.
add .rvmrc to repo
Switch to newest ruby.
Configure gemspec.
Convert tests to standalone gem context.
Force timestamps into UTC timezone.
Ignore log files.
Refactor for more consistant naming using vt, tt, bt prefixes.
Fix missing argument in #bt_attributes_merge.
Fix boundry condition in ActsAsBitemporal.bt_intersects
Clarify comments.
Implement #bt_delete to virtually delete records.
Ensure bt_delete handles future valid records.
Implement AAB::Range#covers? and AAB::Range#merge
Implement valid_time revisions.
Implement #bt_revise
Add #bt_delete2, #bt_delete3 to remove records within a valid time range.
Refactor delete methods to use bt_delete3
Add bt_equal and bt_attributes= utility methods.
Update Range methods to use coerce_range consistently.