Setting sanitize contenthandler configuration as a Map is load.

If a configuration in Aloha.settings.contenthandler.sanitize was defined, this was never load unless
was a text ('restricted', 'basic', 'relaxed'). If a map of object was defined, this setting was
never load (see http://aloha-editor.org/guides/plugin_contenthandler.html).
With this fix, the sanitize object is load.
Let formatlesspaste plugin remove empty tags RT#57942

Previously, it would try to unwrap() an empty jQuery object to
remove an empty element, now it just removes an element if it's
empty.
drag&drop: Dragging and dropping a table inside another table is not permitted.

Nested table are forbidden, but dragging and dropping tables inside tables were permitted. With this fix this behavior is not allowed anymore.
Merge pull request #1135 from najor/hotfix-0.24.x-rt57925-tables-inside-tables

Dragging and dropping a table inside another table is not permitted
Function 'indexOf' is not supported in IE9 documentMode 7.

IndexOf is not supported by documentMode 7, so function 'jQuery.inArray' is used instead.
Merge pull request #1136 from najor/hotfix-0.24.x-fix-indexof

Function 'indexOf' is not supported in IE9 documentMode 7.
Fix english misspelling in changelog entry.
Merge pull request #1131 from najor/hotfix-0.24.x-rt57862-sanitize-allows

The sanitize contenthandler configuration is now loaded, even if it is set as a map
Merge pull request #1132 from wigentics/hotfix-rt57942

Enable formatlesspaste plugin to remove empty tags RT#57942
Merge branch 'hotfix' of github.com:alohaeditor/Aloha-Editor into hotfix-0.25.x
Merge branch 'hotfix-0.24.x' of github.com:alohaeditor/Aloha-Editor into hotfix-0.25.x
[maven-release-plugin] prepare release alohaeditor-0.24.21
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release alohaeditor-0.24.21-commercial
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
Remove commercial changelog mapping.
Merge branch 'hotfix-0.24.x' of github.com:alohaeditor/Aloha-Editor into hotfix-0.25.x

Conflicts:
	pom.xml
[maven-release-plugin] prepare release alohaeditor-0.25.3