Restructure monetization.md as a list of possibilities

Added open source info
Added selling branding and support infrastructure as a possibility
Cleanup the concept

Move contributors.md to the root since it refers to the project and not the actual concept
Move and rename links.md to sparks.md since it refers to the project and not the actual concept
Rename readme.md to make it more distinguished from the other root files
Merge pull request #46 from JanSauer/monetization

Restructure monetization.md as a list of possibilities
Merge pull request #47 from JanSauer/structure

Cleanup the concept
Delete readme.md

The readme can now be found at README.MD