(svn r8111) -Fix r8106: silence warnings

(svn r8110) -Codechange: direct Vehicle::current_order.type changes (to OT_LOADING and OT_LEAVESTATION) replaced by v->BeginLoading() and v->LeaveStation() calls. This should allow easy hooking of those state transitions in order to maintain vehicle loading queue.

(svn r8109) -Fix r5693: ignore .hpp to avoid problems with deps

(svn r8108) WebTranslator2 update to 2007-01-13 19:32:03
danish - 56 changed by MiR (56)
french - 4 fixed by glx (4)
japanese - 77 fixed, 23 changed by ickoonite (100)
norwegian_nynorsk - 5 fixed, 1 changed by pollux (6)
turkish - 4 fixed by jnmbk (4)

(svn r8107) -Codechange (r8106): Show the MD5SUM of the original GRF (saved in savegame) instead of that of the replacement so a user can still go hunt for the original GRF if needed.

(svn r8106) -Feature/Fix: Add the ability to load savegames when you don't have the exact GRF files in your list. GRF files that are found based on GRFID (but not on matching md5sum) are used instead of disabling them. This does not affect MP games, there you still need an exact match.
-GRF Window colour-codes changed a bit: Static is now grey, and compatible GRF (found locally only based on GRFID) are shown in orange. Compatible GRF's also have an orange status/warning text saying they're not the original the game was saved with.
-Loaded games with something amiss regarding GRF's will show an appropiate warning message.

(svn r8105) -Codechange: Change FindGRFConfig so that if md5sum parameter is omitted (or NULL)
only a check for GRFID is done and not on md5sum as well. Remove blanksum in the function as it's obsoleted

(svn r8104) -Fix: missing helpers.hpp added into source.list and VC

(svn r8103) -Docchange: Include station tile types used by RichK's airports

(svn r8102) -Cleanup: Remove unreachable code (r8096), useless cast