adjusted expected interface according to issue #20
changed relations parsing interface as described in #20
added examples of relation parsing in README
added ChangeLog with migration instructions
fix parser doesn't exist error
added some documentation how to run the tests
replaced version ranges with single versions

allowing only a single version in the package.json's dependencies
minimizes the risk of failures due to incompatible library versions.
Merge pull request #25 from missinglink/parser_error

when a parser initialization error occurs now the software no longer tries to close the not created parser.
adjusted path to Long.min.js file for browserify
set version to v0.5.0