Change UMC-Mapcycle parsing from Valve KV to Sourcemod's SMC parser.

[Steell]

Changing this will remove any weird issues normal KV's can have with group names.

Note that this change will require significant changes to how UMC processes the mapcycle. Instead of passing the KV handle to all functions dealing with a mapcycle, instead we will have to pass around some other structure to represent them.

Possibilities:

1. Tries (of Tries)
2. A KV which is gaurenteed to have the correct information (all fields which may be ambiguous when parsed by the KV parser will be stored in a non-ambiguous way [i.e. as Values rather than Sections]).