replace all blanks with non-breaking spaces
Merge pull request #2 from dimagi/nbsp

replace all blanks with non-breaking spaces
Update messages file
have messages_en.txt (old) and messages_en-2.txt (new)
support simple file versioning

and rename files to all have versions
Merge pull request #3 from dimagi/messages_update

Add message versioning and a version 2 en file