Merge branch 'master' into develop
fix(pages): fix dead link to live runner

Closes #13
chore(mixins): removes remaining logs
feat($browser): add the tests seed in the counters div
feat(errors): add extensible error's stack parser
refactor(runner): remove paths storage inside runner
style(matchers): add white space between division
refactor(errors): extract line & column pattern in constant
refactor(errors): change namespace of errors parsing classes
feat(utils): add colorize method in spectacular.utils
feat(formatters): add errors stack and source file formatters

These two formatters produce textual output for an error stack and
source code.
chore(examples): add fail handler for async test promise
chore(Cakefile): add formatters in Cakefile
chore($npm): update packages versions
feat(environment): add fixturePath helper function

Returns a path for a fixture file. This method is used
by the fixture method.
refactor(formatters): handle string lines and simplify promises
refactor($tests): extract formatters tests in their own files
refactor(formatters): changes whitespaces and arguments of error formatters
feat(formatters): add console seed formatter
feat(formatters): add console duration formatter