Fix BL-169:
On Windows, use firefox when opening externally
Some design work
Fix BL-332, "Bloom Pack" no "BloomPack"
Update nuget package information for L10NSharp
Merge pull request #34 from ermshiperete/fixBuild

Update nuget package information for L10NSharp
BloomPack-->Bloom Pack in English TMX
Re-add some strings to Bloom.en.tmx with x-nolongerused=true

Otherwise, they can get added during l10n without that property.
Merge pull request #35 from andrew-polk/BL558_SetUnusedStrings

Re-add some strings to Bloom.en.tmx with x-nolongerused=true