-Rename realcolormaps to default_colormap and make it static to v_colormap.cpp. It can now be accessed via V_GetDefaultColormap.
-Rename DefPal to default_palette.
-Rename current_palette to current_palette_num to indicate it's not a palette_t object.
-Change the parameters of V_BuildDefaultColorAndShademap slightly.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4455 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Cleanup server/src/v_palette.cpp.
-Add V_CreateColormap and V_FreeColormap to handle allocation/freeing of shademap_t objects (fixes crash with dynamically lit maps).
-Additional cleanup of v_colormap.cpp.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4458 b0bcef46-2027-0410-bd56-ab726e9a1d04