(svn r14204) -Fix (r7475): when determining length of a string with limited size, first check if we are not out of bounds already

(svn r14203) -Codechange: [NewGRF] Disable a GRF if it contains an unknown property, or tries to assign an invalid ID.

(svn r14202) -Codechange: [NewGRF] Give more meaningful output if a house/industry/industrytile is undefined in action 3, and continue processing remaining IDs.

(svn r14201) -Codechange: [NewGRF] Don't continue processing an Action 0 if we didn't read the data for a property -- the data will be wrong for subsequent reads.
-Codechange: [NewGRF] *Do* continue processing if the value of a property is invalid, however.

(svn r14200) -Fix (r14199): some OSes failed to compile. Furthermore I hate wrong comments!

(svn r14199) -Codechange: split fileio.h into fileio_type.h and fileio_func.h so not everything that includes saveload.h needs to include everything else too.

(svn r14198) -Codechange: [NewGRF] Simplify handling of common vehicle properties.

(svn r14197) -Codechange: rework (original) base graphics determination methods. This yields in the following:
-Feature: make configuring the to-be-used base graphics via openttd.cfg and the command line possible.
-Feature: allow both the German as well as non-German toyland graphics as "correct" and official graphics.
-Feature: allow people to create their own base graphics easily and without requiring code changes.

(svn r14196) -Codechange: make the searching for files with a specific extension extendable.

(svn r14194) -Fix: don't use hardcoded character offsets to get hg revision. This make it similar to svn and git (ie without the ':').