Fix fuckup

See merge request !598

New node formats

See merge request !595

Revert "Pass along virtnodes to extended nodes loading functions to make sure virtnodes->data is moved correctly"

This reverts commit cfc64285.

Pass along virtnodes to extended nodes loading functions to make sure virtnodes->data is moved correctly

P_GetNodetype: The virtnodes pointer is supposed to be the output parameter, so we have to pass a pointer to that pointer

-Move reading of actual extended nodes into separate function, cutting down on code duplication in the process
-Fix a typo in the segs reading

Refactor map loading functions

See merge request !594

Eliminate all unnecessary uses of ZSHIFT

See merge request !580

Store custom FOF flags directly in back toptexture field at map load instead of re-reading the sidedefs data later on

Add missing MFE_ flags to Lua (resolves #103)

See merge request !592

-Add linedef pointer to side_t, so sidedefs are able to tell if they're a front or back sidedef during setup
-Fix a broken condition during setup of texture fields for the change music linedef

This reverts commit 2cf94ea6.

Fix logfiles crashing Windoze (resolves #102)

Closes #102

See merge request !591

Hack P_SetupLevel into little pie- actually just clean it up a bit

See merge request !587

Remove MF_NOTHINK from join-breaking referenced objects

See merge request !589