added getStaticData function

+ added getStaticData function
+ updated server urls to the latest versions
+ removed PATCH_VERSION variable (unused variable)
+ updated comments
Added function examples

Added examples for the current functions available
Update README.md
Update README.md
Fixed cache result bug

Fixed a cache result bug where if the champions list would be cached and only free to play champions would be requested the complete list from the cache would be returned
Update README.md
fixed getStaticData bug

fixed getStaticData bug, wrong server URL constant was used to fetch data
Merge pull request #1 from xorinzor/development

Update