Bug fixes

• #2991873: implemented support for Gmap Api Localization and language parameter decode in China
• meaningful services and code refactoring
• drupal.org documentation update

Initial stable release after 3 years of beta testing

Addressed vanishing save button when adding new content

Issue #2993650 by matthieuscarset: Wrong placeholder sign @ used by default

1. Update views dependencies in info file.
2. Commented uninstall file.
3. Update default views.