Coingecko

* New exclusive endpoint for Pro users - ohlc/range
* Query inactive coins using coins/list (Pro)
* Use namespace for logging
* Fix missing precision parameter on ohlc endpoint

* New endpoint to check credit balance!
* Updated links for new API documenation page

* Add Onchain endpoints
* Add Examples
* Add custom User-Agent

* Add Documentations
* Add missing parameters in simple/price

* Fix module not found error for ProClient

* First version of the client