- Improved sector references check some more
- Merged all m_check* console commands into a single command 'm_check' which takes parameters of what check(s) to run
Merge branch 'master' of https://github.com/sirjuddington/SLADE.git
Fixed some problems with map geometry not updating correctly after certain operations
Merge pull request #51 from Gaerzi/master

Sync with my fork.
Merge branch 'master' of https://github.com/sirjuddington/SLADE.git
Merge branch 'master' of https://github.com/sirjuddington/SLADE
Repair my old TC's embedded config.

- Allow to remove undesired old things from config.
- Let embedded configs have a "game" section
- Don't let raw DECORATE code (without //$keywords) override
configurated things.
Remove some dead code.
RunDialog would crash without a base resource.
Hexen config: use default textures that exist.

Instead of copying the defaults from Heretic.
Eternity config: added the nightmare spectre thing.
Added ability to read translation tables

Used notably by Hexen.
Found some text lumps that failed to open.

Added a workaround in case they are encountered.
Map texture browser tweaks

Pictures defined in TEXTURES are now sorted separately depending on
their type. Types graphic, patch, and sprite are no longer displayed.
Flats are listed as a subcategory of flats instead of among other
textures. TEXTUREx and TEXTURES are separate, too.
Got a crash on exit in the MapEditorWindow ctor.

This doesn't fix the crash, but it should prevent it from happening
again nonetheless. After all, there is no reason to construct a window
just to close it.
Fixed problems with startpage recent files

The startpage showed up to 11 archives numbered from 0 to 10, but since
the number was extracted by grabbing the last character, 10 became 0 and
clicking the last archive opened the first. In addition, aman_recent*
only managed the eight most recent files, so trying to open the ninth or
tenth failed.
Why so cereous?

Chex 1 and Chex 3 configs, and map conversion console commands to turn
Chex 1/2 maps into Chex 3 maps.
Debug print removal.
VC project file update
Find & Replace dialog fix

The last annoyance with closing it (open it, switch to another
application, go back to SLADE 3, close the F&R dialog) has been fixed.