Waiting for the official deadline for Manifesto redesign
Issue #136:
- rename l10n_moz to DotLangParser
- autoload class  via Composer
-  namespace the app (Langchecker)
- setup Atoum and bootstrapping
- add a first test to a DotlangParser method (copied from Transvision)
Merge pull request #137 from pascalchevrel/issue-136-better-testing-setup

Issue #136:
Extract tag bindings starting with ## TAG: tag_name

* Global status: add a link in the header to translatestrings.
* Translate strings: display a tag near strings bound to tags.
* Error view: manage missing tags, extra tags, tags enabled with missing strings.
* lang_update, json, listsitesforlocale: ignore tag_bindings.