BUGFIX: Remove @RobotKeywords annotation from main class, and exclude it from keyword patterns as well.

Leaving this on will actually make RobotFramework include some keywords twice (I assume it's because this class inherits from the classes that also contain the keywords, so at runtime this will cause those respective keywords to be included twice)
Add Clear Element Text keyword (see HTML/XML doc); also fixed some wrongly documented overloaded keywords
Also commit changes to pom
Set javalib-core version to 1.1, as 1.0.1. doesn't support overloaded keywords
FormElement class documented; fixed small documentation errors in previously documented classes
Fix this one as well
A bit of formatting and parameter name fixing
More keyword documentation added. This should be it