Merge pull request #270 from koo04/master

Adds ability to use range of ports.
Fix bug when changing URLS
Add setting to toggle https requirement
Add setting to check if users are allowed to add subusers
Add check to API to see if it is enabled
Disable force_online by default
Update URL settings to use non http(s) dependent URL and allow localhost better
Update installer to new URL style
Move installer files to new location
Add upgraders

Supports 0.7.3 -> 0.7.5 and everything in-between
Fix links in upgrader
Merge pull request #272 from koo04/master

Ability to change server name, closes #271
Update where admin is checking for installer
Create installing_0.7.5.rst
Create upgrading.rst
Update index.rst
Add alter permission in installer