This reverts commit a00dfcf4.

Update copyright statements for changed names

See merge request !644

Fix S_HAMMER being off by one

See merge request !654

fcam simple controls but slightly less hacky

See merge request !647

Apply skin's highresscale to continue screen

See merge request !645

More OpenGL fixes plus masked PNG conversion

See merge request !619

Local Lua commands + no magic numbers

See merge request !602

Dashmode tweaks

See merge request !646

- Remove the ability for non-SF_MACHINE players in dashmode to break spikes and monitors
- Replace instances of dashmode magic numbers with dashmode constants
- Add dashmode constants to dehacked.c

Fix NPC Amy's love hearts crashing if they didn't have a set fuse

See merge request !641

Add missing glseg checks (and remove a superfluous one)

See merge request !642

Reorder map loading

See merge request !635

Extra functionality for lua

See merge request !601

Fix mouse being grabbed even when not used

See merge request !639

The other way around this time.

This reverts commit 6c85c4e1.

Fix usage of V_GetColor

See merge request !638

Use GCC 8.1 for AppVeyor 64-bit builds

See merge request !624

Add clipboard functionality to the Connect via IP textbox.

See merge request !597