Add failing test for "Crash if session was flushed before commit (with validity strategy)"
Add failing tests for "Version objects of subclasses aren't instances of subclass history"
Fix validity previous_query
Merge pull request #43 from kandarz/master

Fix validity previous_query
Merge pull request #41 from nikola-kocic/validity-flush-commit-crash

Crash if session was flushed before commit (with validity strategy)
Merge pull request #42 from nikola-kocic/bad-object-version-subclass

Version objects of subclasses aren't instances of subclass history
Add failing test case for #40
Fixes #40
Fix column reflection
Fix session flush handling
Add python syntax hl
Test previous/next on multiple articles

Tests for previous/next versions when more than 1 object exists.
Merge pull request #44 from kandarz/master

Test previous/next on multiple articles
Update SA dependency to 0.9.3
Fix tests for mysql
Update SA-Utils dependency
Add more test coverage for accessors
Add more test coverage
Add more test coverage
Update tox deps