Remove validation messages properly, using bootstrap-validator API

AbstractBuildForm.html: more default configs for the editor. Setting size of the editor.
richttexteditor.html: third RTE to show min/max_height.

Support.php: escapes double ticks with " instead of \" - needed for JSON encoded config strings for TinyMCE.
AbstractBuildForm.php: customize default setup for TinyMCE.

Documentation/AdministratorManual/Index.rst: Documentation for TinyMCE integration
AbstractBuildForm.php: Rename 'EditorJQW' to 'Editor' , Integrate 'TinyMCE' as Editor.
formEditor.sql: adjust FormElement.type from 'EditorJQW' to 'Editor'
README.md: update to include latest JS libs

Gruntfile.js: Copy tinyMCE plugins.

 Mockup: richtexteditor.html