remind that model changes may affect IceMapper
add example of adding extra model fields to IceMapper
Adding contributing docs to readme
Update web application development page for Django 1.6
Change Mac OS version.
Merge pull request #575 from ximenesuk/dropbox-reqs

Update DropBox docs for develop
Merge pull request #557 from mtbc/model-changes

remind that model changes may affect IceMapper
11795 fix for sysadmin docs
Adding new line
Merge pull request #572 from hflynn/readme_contrib

Adding contributing docs to OME docs repo readme
Merge pull request #577 from hflynn/11795

11795 fix - Python version 2.6.5 or later required
Merge pull request #574 from knabar/django-1.6

Update web application development page for Django 1.6
Merge remote-tracking branch 'origin/develop' into 11787_server_upgrade
Add note to What's new page about password salting