Exporting sourcemaps in protagonist
Converted list in source maps to collection
Set source map object in the result only if requested
Added tests for sourcemap null when not requested
Added test fixture for exporting sourcemaps
Fixed a bug where values sourcemap is not correctly exported as array
Exporting payload.symbol in AST and sourcemap
Use reference object instead of payload.symbol
Update snowcrash submodule to v0.15.0
Update AST Serialization to 2.1
Prepare for v0.16.0 release, (Exporting sourcemaps)
Install npm@~1.4.6 for travis tests
Merge pull request #29 from apiaryio/pksunkara/sourcemap-release

Exporting sourcemaps in protagonist