File loading adjustments
Feature #130 Adding possibility to specify a category to point rules
points allow to have a sum of points for all categories using :all
Updated README
Updated tests
Updated dummy
Use of fetch when initializing rule attributes to and category from options hash
Deleted log parameter of add_points method
Updated README
Updated tests
Use of a hash for points method args
Updated tests
Updated README
Deleted deprecated substract_points
Use of a hash for category parameter of add_points and substract_points
Updated tests
Updated README
Added a shortcut method score_points equivalent to sash.scores.where(category: category).first.score_points
Updated tests
Updated README
Merge pull request #140 from polopi/master

Points Categories
Removes deprecated methods in light of version 2.0
Code adjustments, mainly thanks to rubocop.
Unit tests adjustments
README, CHANGELOG and UPGRADING updates.
Releasing version 2.0.0