Feature Sets for 0.7 RC

Core:
* Improvement to `RuleCarrier` by following *Law of Demeter*

Metrics:
* add references
* add unit tests for existing metrics
* take care of `extern "C"`

Improvement to Existing Rules:
* add references
* improvement to `StdUtil`
* reconsider priorities for certain rules
* support `__objc_bool` in related rules
* improvement to redundant conditional operator rule
* improvement to parameter reassignment rule
* improvement to unused local variable rule
* improvement to dead code rule
* improvement to double negative rule

New Rules:
* misplaced null/nill check
* broken null/nil check
* redundant nil check
* short variable name
* long variable name
* too many fields
* too many methods
* too many parameters
* avoid branching statement as last in loop
* jumbled incrementer
* objective-c number literals
* objective-c boxed literals
* objective-c container literals
* objective-c object subscripting

Scripts:
* automatically delete all builds when `buildRelease`
* extract `testAll` from `ci`
* extract `buildAll` from `ci`