Regular expression to capture error output of cmd
Add 'knob' gutter mark theme
Fixes #231

    * Fix #231
        When an environment hook file (.anaconda) was present but it
	could not being parsed as valid JSON, anaconda loops forever.

	Added gracefully fail and show an error message to inform
	the user about the problem in the hook file.
Fixed typos and improved fix for #231

    * Fixed misspelled word environment in error message
    * Improved condition to show try to get the python_environment in
      the hook file depending on the view identification
Fixed #230

    * Seems like the PyLint linter had never worked at all due an
      unknown cache in PyLint when it's used as library (that is not
      supossed to). Taking a look in #230 I discovered that when
      `pylint.lint.Run(args)` is being used as library it caches the
      content of the given file or just the reporter output (I didn't
      determined really where the cahce was).
    * Change: Replaced the handler for a spawn process that call:
          sys.executebale -m pylint.lint args
Merge branch 'master' of https://github.com/piit79/anaconda into piit79-master
Merge branch 'piit79-master'
Merge branch 'patch-1' of https://github.com/bismarckjunior/anaconda into bismarckjunior-patch-1
Merge branch 'bismarckjunior-patch-1'
Merge branch 'pylint_fix#230'
Merge branch 'fix_hook_files#231'
release messages updated