I've just succesfully added GetSimple translation file to my Transifex account. Maybe you just had a problem with SVN connection?
UPDATE: but I am having trouble importing my Lithuanian translation - it is not recognized.
UPDATE 2: found solution - file was not recognized, because it was generated with GetSimple translate plugin and Transifex is very picky about formatting, it expects to find commas at the end of the line.
Here's the link, if anyone is interested to join: https://www.transifex.net/projects/p/getsimple/
I still need to figure out, how to set up separately dev version and release versions.
UPDATE: but I am having trouble importing my Lithuanian translation - it is not recognized.
UPDATE 2: found solution - file was not recognized, because it was generated with GetSimple translate plugin and Transifex is very picky about formatting, it expects to find commas at the end of the line.
Here's the link, if anyone is interested to join: https://www.transifex.net/projects/p/getsimple/
I still need to figure out, how to set up separately dev version and release versions.