Added TinyMCE libraryfor post creation.

Manipulated the layout and the view Class to support dynamic inclusion
of scritps and styles.
New security strategy - use of htmlpurifier lib.

Manipulated the files that add/edit/show the user
created content. The HTMLPurifier library is responsible for
filtering the user input, thus no checks are happening
except during insertion or change of user content.
Including htmlpurifier lib with the project.