Support DESTDIR on make install
Merge pull request #138 from andreasrs/master

Support DESTDIR on make install
Fix resource groups size in C-interface
Fix resource groups size in C-interface and Enumeration added
Merge pull request #145 from alikh31/alikh31/issue#144

Enumeration Correction in C-Interface. Closes #144.
Issue #109

Fixes issue #109 where nested parentheses within the parameter signature additional traits caused a failure to correctly recognise the signature as valid due to not matching the ParameterAbbrevDefinitionRegex.
I have removed the regex in favour of manually parsing the parameter signature so as to make the code clearer and more maintainable than what the regex would have had to become in order to match nested brackets within the additional traits as well as possible additional brackets in the signature description.
Merge pull request #146 from kuangmarkeleven/kuangmarkeleven/parenthesesInParameterExamples109

Issue #109
Issue #107

Fixes #107. Amended regex PARAMETER_IDENTIFIER to allow % encoded characters and added tests for valid, invalid and incomplete % encoding.
Merge pull request #147 from kuangmarkeleven/kuangmarkeleven/SupportPctEncodedValuesInURIParametersDescription

Issue #107
Prepare for v0.12.1 release
Merge pull request #149 from apiaryio/zdne/release-v0.12.1

Prepare for v0.12.1 release
portable homebrew install (mitigates hardcoded /usr/local/bin)
Merge pull request #168 from wilmoore/homebrew-formula

portable homebrew install (mitigates hardcoded /usr/local/bin)
Remove direct Sundown dependency
Parser refactor orgin

The aim of this major refactor is to bring easy syntax extensibility
via parser modularity. See https://gist.github.com/zdne/55b7a38f52ca642e123b
the parser prototype.

This commit / refactor also introduces new redesigned Markdown parser – https://github.com/apiaryio/markdown-parser.
Reporting & section context parser data origin

Parsing foreign asset blocks.
Code block signature check origin. Additional asset tests.
Excessive indentation check origin
WIP: Header parser refactor in progress
Completed HeadersParser refactor