Updating events list and some small bugfixes.
Implemented Gladiator's Longbow and fixed some Weapon related bugs
Added information about card quality to cards.csv
Updated tests to include a test for card rarity.

 This also includes updates to the cards which had incorrect rarity.

 It turns out I had a bad understanding of rarity.  There are common cards which are part of the basic set, and the expert set.
Changed spell_power to spell_damage as discussed in issue #31
Fix for Lightspawn so it works with  Dire Wolf Alpha

Also changed attack to only generate one event, attack_changed.
Furthermore, combined increase_attack and decrease_attack into one
 method.
Formatting changes to bring hsgame module project up to pep8 standards.
Formatting changes to bring tests module project up to pep8 standards.

Also added a config file for easily running pep8
Fixed errors in Warlock.py so that the project passes pyflakes validation.
Formatting changes to bring most of minions up to pep8 standards.
Fixed a link error
Formatting changes to bring most of spells up to pep8 standards.
Formatting changes to bring most of weapons up to pep8 standards.
Worked on contributing.rst and some other documentation issues.
Let Lightspawn's attack be above 0 when increased by another minion

Closes #32.
Fix for Lightspawn
Implemented Light's Justice
Implemented Sword of Justice
Implemented Truesilver Champion
Fix for Sword of Justice

As Daniel pointed out.