Add fpcalc.exe and discid.dll to ignore list

fpcalc and discid.dll are put in the development directories when you
build the development environment according to the instructions on the
musicbrainz web site - and they should not form part of the repo.
Resequence ID3v1/2 fields in Options / Options / Tags

Resequenced ID3v2 fields so that they are together with ID3v1 fields
following - previously ID3v2 fields were split with an ID3v1 field
inbetween, This is less confusing to the user.
Switch to *.exe as recommended by Lukas
Switch to *.exe (with new line at end) as recommended by Lukas
Allow tab access to toolbar, set tab order
Fix tab order in metadata options
don't call setKerning, change groupbox names
run build_ui on ui/options_tags.ui
Improve accessibility descriptions for the main panels
Include Qt accessibility plugin in the windows build
Make the previous commit actually work...
Kill tab character

This is what I get for using an unconfigured gVim on Windows.
Remove py2app hacks that are no longer necessary (using 0.7.4)