New STJR Intro and related changes (resolves #202)

Closes #202

See merge request !1132

(cherry picked from commit 3437b0690a3f4278e3ecc657102a126a3e2f3d13)

(cherry picked from commit 0d57ba1d02c5bde2ab22a71d21a95849b21e9539)

SteelT authored 5 years ago and James R. committed 4 years ago

(cherry picked from commit cb9004e4cfa94251ab0d31f19fee187fc4e9abcc)

(cherry picked from commit 7a05a8acf73ac0f012135339447c9a935e3b7939)

Make the scene time be 5 seconds long max

Use the standard fade which is much shorter in length.

Detect which system the Makefile is running on to compile for

See merge request !1123

Use WARNINGMODE by default

See merge request !1122

Change the code a bit so less magic numbers.

Fix Ringslinger weapon ring penalty missnapment

See merge request !1120

Fix bug where SRB2 would check size of disk from current directory instead of srb2home

See merge request !1121

Fix lingering issues with the http-mserv merge

See merge request !1117

This should work for mingw and linux so far.

(cherry picked from commit ef2bff6383b16385f9874e1c9c6b66c9df794f5b)

Add a menu option for showjoinaddress; disable it by default

See merge request !1115

Hopefully that fixes that one bug with weird filesize issues too

REMOVE THE LAST OF CV_ALLCAPS

See merge request !1116

I also had to make the "alphaKey" UINT16. Hopefully nothing breaks!