Merge pull request #238 from inthause/documents

[NEW] Add Storage\StorageManager::getPublicURL and buildChangeURI
Added "min-height" on the preview area to avoid flickering effects.
Added "min-height" on the preview area to avoid flickering effects.
Added comment on Utils.normalizeAttrName().
Enhanced actions management in <rbs-document-list/>:
- if "actions" attribute is NOT present, default actions are used;
- if "actions" attribute is present and empty, no actions are used;
- if "actions" attribute is present, the string "default" is replaced by the default actions.
Added "Refresh" button in <rbs-document-list/>.
Moved Refresh button before the options buttons.
- Renamed attribute "cascade-edit" to "cascade-edition" in <rbs-document-list/>. Scope method to cascade edit a Document has been renamed to cascadeEdit() instead of cascadeEditFn().
- Added arrow icon after the label when the link does not lead to an edition form.
Enhanced RichText input with Media and links to pages. Still needs work for the URL generation...
Markdown parser now allows optional Model name for Media and links definition. While the editor provides them, the user can use only the ID for shorter notation. If provided, the Model name is checked with the ID. Errors are displayed in case of invalid documents.
Enhanced styles in <rbs-rich-text-input/>.
Fixed missing "required" attribute on required fields.
Merge pull request #239 from fredericbonjour/Admin

Enhancements in <rbs-document-list/> and Rcih text edition.
[NEW] Add ThemeManager::installPluginTemplates