Changed degree character to html representation, closes cmfcmf#15. Th…

…anks @CheckeredMichael!

Refactored and fixed cache, closes cmfcmf#9, thanks @goranata for rep…

…orting!

Update README.md

Merge pull request cmfcmf#7 from cmfcmf/refactor

[BC breaks] Refactoring, added weather history, removed autoloader.

Now with forecast functionality!

Added example call.

Uploading first version