Update docs/install.rst fix InstallationError

This fix: InstallationError: --editable=git+git://github.com/jaimegildesagredo/booby.git is not the right format; it must have #egg=Package
Update README.rst fixing InstallationError

Update the command here too.
Fix small typo in docs
Merge pull request #1 from shakaran/patch-1

Update docs/install.rst fix InstallationError