Recognize body with content on its signature
Fix warning messages when abbreviated payloads
Recognize Parameters with non-recognized no newline parameter
Parameters can be a description of Payload
Review fixes
Merge pull request #161 from apiaryio/pksunkara/refactor

More regression fixes
MSON AST origin. MSON property parser origin.

Conflicts:
	snowcrash.xcodeproj/project.pbxproj
Implicit use of Value<T>::value_type in element value helper
Rename ValueType to DataType for better clarity
Signature parser origin, MSON element parser origin.

Conflicts:
	snowcrash.gyp
	snowcrash.xcodeproj/project.pbxproj
Add checking & warnings to the signature parser

In addition the signature parser is now of standard-parser grade consuming
node iterators and parser data. Also the signature parser now returns any
remaining multiline content.
Support for `-escaped signature variables
Fix project files
SectionTraits origin, singleton sections check origin
MSON element signature parsing completed
Fix wrong copy-pasted test, remove unimplemented property parser tests
Rename Signature Trait "traits" to "specifiers"
Array value parsing
Finished element signature parsing
Finalized MSON property signature parsing