Rom

[changed] Added exception when performing .all(), .execute(), or .count() on
query objects that have had no filters or attribute ordering provided.
This addresses issue 12.
[changed] Moved column definitions to their own module, shouldn't affect any
normal uses of rom.
[added] For users of Redis 2.6 and later, there is a beta Lua-enabled writing
option that allows for multiple unique columns on models. In some cases,
this may improve performance when writing many entities very quickly.
[added] The ability to reload an entity from Redis, optionally discarding any
modifications to the object itself. Check out the documentation for
Model.refresh(), Session.refresh(), and Session.refresh_all()
[added] Tests for the newly changed/added features.
[changed] Tests no longer use flushdb() - all test models/indexes/etc. are
prefixed with RomTest, and we find/delete such keys before and after any
tests are run. Now anyone can reasonably run the test suite.

[fixed] Thanks to a bug report by https://github.com/MickeyKim , was notified
of a bug when using unique indexes, which is now fixed and has a testcase.

[fixed] Thanks to a bug report by https://github.com/MickeyKim , was notified
and received an interim patch for a bug that could cause deleted entities
to be resurrected on session.commit() or session.flush() . This has now
been fixed and a testcase has been added.

[added] LGPL 3 licensing option.

[added] Thanks to a feature request from https://github.com/jrsmith , Boolean
column support is now available.
[added] DateTime, Date, and Time column types because I was already adding
Boolean columns.

[fixed] Thanks to https://github.com/MickeyKim who fixed Json columns so that
they round-trip after multiple saves.