Partial Rewrite of Parameter Handling

[TedStudley]

This partial rewrite is designed primarily to make parameters easier to use while testing. It does also come with some additional improvements, such as better support for optional parameter sections, better parsing/casting logic, and better exception support.

• Replaced nearly all usage of 'ParamParser' with 'Params', to separate the usage of parameters from the usage of the parser which populates them.
• Changed getParamX and queryParamX to be templated functions, using the boost::lexical_cast method to cast the parameter from string to a usable type.
• Updated tryPush to create a temporary param node, to prevent all the hackish work-arounds with if-blocks and populating default parameter values.
• Added an 'interface' class for a parameter builder, which the new ParamParser inherits from. A ParamFactory class will also inherit from this base class. TODO: Find a way to get params back that doesn't cause a segfault when closing the program.
• Added a new test for basic param features, like nested sections and param value casting.
• Updated all param-based code not to use using namespace and to have slightly better coding practices. (Still need to do a pass over the entire codebase)
• Fixed a couple of minor issues throughout the codebase

[TedStudley]

This patch will fix issue #9