Rearrange infoWindow contents to shrink icon size

Addresses issue #1057
Merge PR #1058
Try to track the capabilities of our outputdir filesystem.

For example, don't chmod if the filesystem dosen't support chmod, and
don't rename over files if that's not supported (this functionality was
already in place).

Should fix #1061
Related to #1055 (we could add a mtime capability flag)
display region file name in map coordinates view
correct coordinates and bold the x/z labels
Fixes for locale issues

There were some problems when a level.dat contained a non-ascii name, or
when a level.dat lived in a directory with a non-ascii name.

Paths returned by os.listdir are encoded, so we need to decode them
before printing them.  When calculating the max length of the enumerated
world names, were we for some reason calling str() before taking the
len().  The had the effect of converting unicode strings into
non-unicode strings, which is not the correct thing to do.
Merge pull request #1066 from wilg/master

display region file name in map coordinates view
Merge pull request #1064 from overviewer/fscaps

Try to track the capabilities of our outputdir filesystem.
Merge pull request #1068 from overviewer/locale_fix

Fixes for locale issues