Only saving a File instance when native properties of the field have changed

- Changes in related fields do not count

- This update was done in order to prevent files from being saved and having their update date-time everytime the instance they're bound to was saved.

- Now all bound files are only updated when permissions are changed on their bound instance.
Version bump to 5.1.266
Update when detecting file changes
Adding new theme to project_template directory named "Fasi"
Version bump to 5.1.267
Adding a new theme to project_templates
Merge pull request #330 from jkimma/master

Adding a new theme to project_templates
#725: Updating Profiles' export to NOT use celery
Version bump 5.1.268
Explicitly adding user to group on Membership.renew() call
Version bump to 5.1.269
Adding salesforce sandbox mode environment variable
Updating salesforce corporate membership feature

- Add to SalesForce leads when corporate membership is approved

- Commented out the portion that would update the SalesForce lead as soon as the corporate membership was added or changed.
Version bump to 5.1.270
Updating salesforce integration
Version bump to 5.1.271
bugfix: resolve import error for get_salesforce_access
version bump
Merge branch 'master' of github.com:tendenci/tendenci
update deploy.py to prevent the commands from running out of the order

unlike os.system, subprocess.check_call will wait for command to complete