This reverts commit 2e27f32d.

Make V_DrawCenteredSmallThinString() a less precise wrapper for V_DrawCenteredSmallThinStringAtFixed() for new "small-thin-center" option in v.drawString()

Make V_DrawRightAlignedSmallThinString() a less precise wrapper for V_DrawRightAlignedSmallThinStringAtFixed() for new "small-thin-right" option in v.drawString()

Create V_DrawCenteredSmallThinStringAtFixed() for new "small-thin-fixed-center" option in v.drawString()

Thankfully "center" is just "right" but with the X offset divided by 2.

Create V_DrawRightAlignedSmallThinStringAtFixed() for new "small-thin-fixed-right" option in v.drawString()

You guys have no idea how long this took to code.

Make V_DrawSmallThinString() a less precise wrapper for V_DrawSmallThinStringAtFixed() to fix rounding errors.

I removed the limitation present in "small-thin" by converting all relevant variables to fixed_t's and using FixedMul() and FixedDiv() when necessary. Who'da thunk it would actually work?

These function names are starting to become rediculous...

Note this has some major limitations to prevent squished text. It defaults to using V_MONOSPACE|V_OLDSPACING and you cannot change the size of characters. V_6WIDTHSPACE seems to act exactly the same as V_OLDSPACING too.

Please, for the love of God, Jesus and Bastet, ADD EVERY OPENGL COMMAND REGARDLESS OF THE FREAKING RENDERER!!!!!!!!!!!!!!!!!!!!!!!!!!!

- Update x coordinates for credits_pics entries
- Reorder credits_pics entries (what even was the previous order lol)
- Add zig zag graphics to credits roll
- Attempt to scale the y positions of credits graphics with the length of the credits roll
- New escape character for credits entries: \2, which centers the text and makes it yellow
- Add support for colored text to V_DrawStringAtFixed

Also, change all the references to XTRA_ constants to consistently check for > its value, instead of >= its value plus one (or that there's any frames at all) - for extra clarity/consistency, and capacity for re-ordering later.