variable 7.x-1.2

Overview of improvements:
- Added new variable types, extended the API, some Views support.
- Fixed multiple issues and improved API consistency.
- Added documentation, tests and variable example module.
- Added features export for full variable realms.

Full list of changes:
1810611 Issue #1219724 by Jose Reyero: Better handling of array and multiple variables. Moved format function to main module.
7ca285a Issue #1219724 by Jose Reyero: Better handling of array and multiple variables.
5d18b7c Issue #1430126 by Jose Reyero: Add tests and example module.
b07dde6 Issue #1395746: Added Views contextual filter integration and some more views support.
178af72 Better formatting for unknown variables.
d7cee4a Issue #1508796 by El Matador Y Ty...: Localize 'text_format()' variable type.
197e31b Issue #1510406 by Jose Reyero: API improvements: variable_store_delete_all(), variable_store_list_all().
6b9d046 Issue #1086986 by Jose Reyero: Features support for Variable store (multilingual variables, strongarm support, variable re
6b419a1 Issue #1491160 by Jose Reyero: Variable Realm / Store API clean up.
86f981f Issue #1370518 by B-Prod, bastnic: Fixed variable_realm() not used.
9cef74f Issue #1430126 by Jose Reyero: Add tests and example module for variable store/realms.
4e27d69 Added some pages to variable example.
501adba Fixed variable_store_load() hook naming conflict, https://drupal.org/node/1344994
770c1e0 Issue #1377796 by bastnic: Fixed Multiple variables uses errors.
2591ee8 Issue #1377796 by bastnic: Fixed Multiple variables uses errors.
a3ebbe8 Issue #1316428 by jessepinho: Number/URL/etc. variable types in variable_variable_type_info() should have 'token' => TRUE.
02afde6 Coder review.
5f9db37 Issue #1380266: Added example of mail text variable.
87abcd9 Issue #1430126 by Jose Reyero: Add tests and example module.
1810611 Issue #1219724 by Jose Reyero: Better handling of array and multiple variables. Moved format function to main module so it
7ca285a Issue #1219724 by Jose Reyero: Better handling of array and multiple variables.
5d18b7c Issue #1430126 by Jose Reyero: Add tests and example module.
b07dde6 Issue #1395746: Added Views contextual filter integration and some more views support.
178af72 Better formatting for unknown variables.
d7cee4a Issue #1508796 by El Matador Y Ty...: Localize 'text_format()' variable type.
197e31b Issue #1510406 by Jose Reyero: API improvements: variable_store_delete_all(), variable_store_list_all().
6b9d046 Issue #1086986 by Jose Reyero: Features support for Variable store (multilingual variables, strongarm support, variable re
6b419a1 Issue #1491160 by Jose Reyero: Variable Realm / Store API clean up.
86f981f Issue #1370518 by B-Prod, bastnic: Fixed variable_realm() not used.
9cef74f Issue #1430126 by Jose Reyero: Add tests and example module for variable store/realms.
4e27d69 Added some pages to variable example.
501adba Fixed variable_store_load() hook naming conflict, https://drupal.org/node/1344994
770c1e0 Issue #1377796 by bastnic: Fixed Multiple variables uses errors.
2591ee8 Issue #1377796 by bastnic: Fixed Multiple variables uses errors.
a3ebbe8 Issue #1316428 by jessepinho: Number/URL/etc. variable types in variable_variable_type_info() should have 'token' => TRUE.
02afde6 Coder review.
5f9db37 Issue #1380266: Added example of mail text variable.
87abcd9 Issue #1430126 by Jose Reyero: Add tests and example module.
25d354f Issue #1430126 by Jose Reyero: Add tests and example module.
f2df029 Issue #1190584 by luco: Move to Variable package. (Module should have its own group?).
864909a Issue #1371906: Fixed variable_store() function utilize drupal_static() pattern in a wrong way.
99c3788 Issue #1371906 by Taran2l: Fixed variable_realm() function utilize drupal_static() pattern in a wrong way.
98aded2 Issue #1359400: Delete also realm and store values for variable.
e5822d9 Issue #1359400: Fixed Variables don't get deleted.
35c5365 Issue #1316436 by Cyberwolf, guillaumev | rfay: Added Support #format (as in #type = 'text_format()').
f2df029 Issue #1190584 by luco: Move to Variable package. (Module should have its own group?).
864909a Issue #1371906: Fixed variable_store() function utilize drupal_static() pattern in a wrong way.
99c3788 Issue #1371906 by Taran2l: Fixed variable_realm() function utilize drupal_static() pattern in a wrong way.
98aded2 Issue #1359400: Delete also realm and store values for variable.
e5822d9 Issue #1359400: Fixed Variables don't get deleted.
35c5365 Issue #1316436 by Cyberwolf, guillaumev | rfay: Added Support #format (as in #type = 'text_format()').