Use composer for autoloading, fix code coverage whitelist
Fix CallbackIterator and test
Remove now unneeded check in CallbackIterator
Add unit test for Calcul without result, 100% coverage
Merge pull request #1 from igorw/composer-autoload

Composer autoload (and other fixes)
Better syntax highlighting
Merge pull request #2 from umpirsky/patch-1

Better syntax highlighting in README
Spelling.
Merge pull request #4 from lndbrg/patch-1

Spelling.