EventsFUN called directly via function handle and removed support for passing additional parameters except via function handle.

EventsFUN is now called directly via function handle instead of via FEVAL. Support for passing additional parameters as varargin inputs to shc_lv_integrate() removed because it slowed things down. Best practices should be used anyways, and additional parameters passed via the function handle itself.

FEVAL is still used for RandFUN because I'm unsure about the issue with overloading that FEVAL supposedly handles. In any case, its not FEVAL that's slow, but the the varargin's.

Signed-off-by: Andrew D. Horchler <adh9@case.edu>