Add l10n_ch_hr_payroll.
Update README.md

Add l10n_ch_hr_payroll to readme.
Add some minor changes, based on pull request #66 comments.
Some changes in copyright
Merge branch '8.0' of https://github.com/open-net-sarl/l10n-switzerland into 8.0
For add the change in main readme.
Fix  2 pep8 errors.
Fix error in big comment header.
Remove description from l10n_ch_hr_payroll/__openerp__.py file.
Merge pull request #66 from open-net-sarl/8.0

Add l10n_ch_hr_payroll.