SST Beta 0.15 (a.k.a. Superlative Spaghetti Terribleness)

Fun fact: this release contains self-modifying code! Though I might get
rid of that because it's stupid. Still, wanted to get the release out,
so, it's in there for now!

Actual features:

* 4104 portal colours (thanks Evan Lin for working that out)

* Preliminary Old Engine support - probably incomplete/buggy and a lot
  of features don't work yet. Considering experimental but ready for any
  OE people who want to go looking for bugs or whatever.

Additional bugfix: games with all-uppercase titles got displayed in
inverted title case in the console on plugin load; now they are
displayed in correct title case. This was never noticed with Portal and
Left 4 Dead 1/2 being the main supported games, since their titles are
not upper case, but this notably fixes Half-Life 2.

Thanks, and have fun! :^)