Merge pull request #5 from oster/master

just syncronizing
actually, creative is in the Exercise menu
rerun po4a
speedup the large worlds of Koch
give the pseudo code of the general case for the first recursive trees
speedup the large sierpinski worlds
mouse coordinates should be consistently in black
loosen the slope equality test, and display slope in debug mode
don't do lame tests, and don't fail either
let the details area grow to take any additional space
also merge lines that have the same end, not only the same start
detect when lines are included one within the other with no common extremities

Fix #381
Fix the name of a Scala entity (fix #383)
Fix a bug from GitSpy overwriting current files by the last result's ones when switching exercises
Merge pull request #384 from oster/fix-gitspy-createfiles

Fix a bug from GitSpy overwriting current files by the last result's one...
translating
Merge pull request #385 from FredMaranhao/master

translating to pt_BR - 54% done
Fix a broken link when run from the jar (fix #387)
regenerate the translations, no manual change
document the current level of pt_BR