Update package.json

Added repository filed, as this is recommended and nice
Merge pull request #207 from Orkeren/patch-1

Add repository tag to package.json
Revert 7bc406d 'Update package.json'

This reverts commit 7bc406d because the repository field is already in there.
Update README.md
Merge pull request #374 from Multy7/master

Added link to the Ubuntu build and install script to README