This solves two problems:
* The linked list is too slow, a map is better. A map cannot be used with statically allocated CVARs because order of initialization is undefined.
* The current CVAR system is an unordered mishmash of static variables and dynamically allocated ones and the means of identification are unsafe. With this everything is allocated on the heap so it can all be handled the same by the cleanup code.
Mainly to avoid problems with Raze, but eliminating this constructor lets us catch erroneous local definitions via 'auto', which can cause major problems if left undetected.
To compensate there is now also a "stat fps" which displays the FPS rate in the lower left corner. This had to go because unconditionally altering positions was causing problems with custom HUDs.
* it is now possible to switch back to the main intro loop from the fullscreen console.
* do not distort the background of the fullscreen console. Always draw the console on top of what the main loop currently displays with a translucent black overlay.
* do not use the CONPIC for the fullscreen console as it tends to be more of a distraction than an asset when filling the entire screen.
* cleaned up c_console.cpp and moved several pieces of code unrelated to actual console management out of it.
- screen bevel now enlarges also when screenblocks <= 11
- make intermission and status bar scaling game-specific in the config
- add scaling customization for classic ui flat scaling
- make screen border flat scale up
- inter_classic_scaling now defaults to true
- fixed: last commit I accidentally left hardcoded testing values and did not change them back to check for the texture's original size
- implement cvar 'inter_classic_scaling' to render the intermission flat as if it were 320x200
* moved the sprite renaming out of the file system entirely into a caller-provided callback.
* renamed several functions to closer match the terms of a file system.
* moved the VM interface out of the implementation.
These were creating dangerous interdependencies. It is better to do explicit conversions when needed.
As an added plus, this means that zstring.h no longer depends on name.h which was very annoying.
- replace swapvalues with std::swap globally.
- added some additions to utility code from Raze, mainly to reduce file content differences.
- reduced some unused utilities
