Update link to main repository in README
Merge branch 'dev'

Merging content from dev
Merge from dev (Colobot Gold 0.1.0-alpha)
Import the correct french data files
Move all help files that are level-specific to level-specific directories
Initial level files files translations infrastructure
Fix installation of help files
Only translate fully-translated levels, allow fallback to previous help files
Only do levelsfiles if there's a po4a available
TEMP translations
Use a cleaner and clearer filename for the single-character language identifier
Take the '\s;' blocks into account
Finish the \s; support; take the \*; into account, don't translate them
Handle the image filenames translation; it might be needed
Drop tabs' support
Enhance bullets' detection
Drop more useless code, make sure to have no superfluous eol
Drop eol's at the end of the translatable materials
Simplify the code slightly