Update en.coffee

Updated achievements titles. Don't know if lines 750-752 are needed or not, as they do not display in the website.
Merge pull request #1754 from Imperadeiro98/patch-1

Update en.coffee
Some fixes for programmatically generated flag events not polluting session flag history.
Fixed being unable to select important spells on a few old, multi-spell levels.
Added more translations
Merge pull request #1758 from Soraph/patch-2

Added more translations
Made a few new levels available for advance early playtesting.
Merge branch 'master' into production