Rule preventing assigning an ivar outside of getters/setters/init.
Fix comments from review for ObjCAssignIvarOutsideAccessorsRuleTest
Fix comments from review.

Use _ for ivars.
Move string utilities into StdUtil.
Minor style changes.
Add back mistakenly missing test case file.
Make assorted utilities inline and fix issue with capitalizing a zero length string
Create StdUtil.cpp and move some helpers to it. Rename capitalize to capitalizeFirstLetter
Cleanup dogfooding errors
Fix up tests for assign ivars
Add AttributeHelper and factor code to use it
Move ObjCAssignIvarOutsideAccessorsRuleTest from migration to convention
Add attributeName method to RuleBase
Merge branch 'assign-ivars' of https://github.com/aleffert/oclint into aleffert-assign-ivars
Minor changes from review
Switch attribute helper methods to take a rule reference.
Add EnforceHelper per review
Remove moved declaration from header
Make tests pass on Linux
Remove extra comma in CMakeLists for cocoa preventing rules from building
Update parameter name after dogfooding
Merge branch 'fix-cocoa-make' of https://github.com/aleffert/oclint into aleffert-fix-cocoa-make
Merge pull request #127 from aleffert/attribute-factor

Factor attribute checking code and add a new attributeName property to RuleBase