Updated .gitignore

Added ignore rule for compiled SourceMod plugins.
Reworked "Prop Bonus Round" into "Propify!"

Functionality of the "Prop Bonus Round" plugin has been moved to
"Propify!", a standalone plugin that allows player propping by admins
and exposes propping methods; and a new "Prop Bonus Round" that uses the
exposed methods from "Propify!" to force the losing team into props.

Though this means the web compiler cannot be used to compile the
end-round functionality of the plugin, it also opens up the ability of
propping players to be integrated elsewhere and functionality is fully
modularized.
Updated Propify + End Round

Code cleanup fixes flooding the commits.  Just this once.
Updated Propify

Allowed the sm_prop to switch to specific props in the proplist by
index.
Updated Propify

Added bounds checking for sm_prop.
Updated Propify.

Added default sm_prop behavior of toggling out of prop and made -1 force
a switch to a random prop.  Bumped up version number for increased
sm_prop functionality.
Updated Propify.

Fixed behavior of sm_prop command for forcing specific props.
Updated Propify.

Updated sm_prop usage text, now using string literal concatenation
feature introduced in SourceMod 1.6.0.
Updated Propify.

Refactor updates.  Changed data directory for proplist files to
/data/propify/ in place of the previous /data/propbonusround/ structure.