Initial commit wrapper for API v0.8

most api endpoint functions in wrapper, some examples, access token flow
Added examples for all wrapper functions
Changes function names to be more clear
Added PRINTR header ascii art to all files
Clean up, credentials in separate file
added accessToken.txt to git ignore
readme
rewrite to composer package
Merge pull request #1 from PRINTR3D/v0.8-dev

V0.8 dev