Doesnt seem to check config before initial fetch

[ot2sen]

Was just fetching files from a project having mixed ressources, where some have 15- prefix and other have 25- prefix in resource names.

And the project config in Ctransifex only have info about the 25- prefixed ressources.

But it seems that CTransifex fetch all available ressources from Transifex, and not only those set in project config file.
This slows down the fetch process as it seems to travel through all resource files for the build. Would think it should only fetch those mentioned in the config field.