FLUID-5484: Testing Framework docs

Converted from http://wiki.fluidproject.org/display/docs/The+IoC+Testing+Framework
@jobara, you should probably make sure you look at this page as rendered, to make sure the row identification in the table toward the end is ok from a usabilit/readability perspective.
Using the '*' may be a bit overloaded as it doesn't necessarily look like a reference to a note. Maybe use a different symbol or something like <sup>[1]</sup> instead.