Added introduction
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Update API.md
Rev 0.2
Update API.md
Update API.md
Update API.md
Rev 0.2 ready for revision
Merge pull request #3 from porzech/master

Ok