Added a development enviroment helper

In the header.php file I have added some code to help when running on a
local server. Read the comments above it to understand more about what it
does and if you require it.
Fixed a small coding error with the new addition
Another small fix for when not on localhost
Removed small banner and replaced it with the logo changing
Merge pull request #14 from VizuaaLOG/master

Added some code to help when developing.