Modify README.md
Add .gitattributes

This file contains a line that makes the README.md
in the master branch stay the same when merging
the development branch into the master branch.
Merge branch 'development'
Modify README.md
Merge branch 'development'
Merge branch 'development'
Merge branch 'development'
Merge branch 'development'
Merge branch 'development'
Merge branch 'development'
Merge branch 'development'
Modify .gitignore
Merge branch 'development'
Run 'send_mail' on a seperate thread

The 'sendmail'-command can take some time, so
in order to avoid delay in the browser, this
function is run on a new thread.
Merge branch 'development'
Merge branch 'development'
Add js-files for ordering in HairdresserAdmin
Add HairdresserAdmin

For drag and drop-ordering of hairdressers.
Add list_postition field for sorting and override 'save()'

In the hairdresser admin, a drag and drop functionality
is available for reordering. The save-function sets the
list_position-fields of the objects when saving.
Change the 'order_by' property for hairdressers