Made perf impovements
Added perf metrics
Merge remote-tracking branch 'origin/master' into perf-refactoring
Parser implemented as iterator for creating tests + added tests based on test examples
Added grunt automation for testing and linting
Added config for travis ci
Added build status to Readme
Fixed bug with underscore slicing
Merge pull request #1 from a-ignatov-parc/perf-refactoring

Performance refactoring