Correct imports.
Add Aptana/Eclipse files to .gitignore.
Move Scenario to its own module.
Cleanup scenarios module.
Add keywords, cleanup exception messages and code.
Updating init_country and adding tests
Remove country parameter.
Simplify XAxis.
Rename xaxis to x_axis.
Remove trailing spaces from lines.
Remove simulation drawing methods from core and convert them to functions.
Remove useless and now obsolete code after move of TaxBenefitSystem class in its own module.
Updating init_country and adding tests
Cleaning empty lines
Fixing tests to work with updated openfisca_core
Removing obsolete import
Removing country arg from examples