Added a version information section to the footer

|WEB|
[/common/site.php]
* Added the contents of gitver to the footer
Added a specific Git version to the footer
Added a table to the footer to separate the Git version and copyright notice

|WEB|
[/common/site.php]
* The footer is split to have the copyright notice on the left and the Git
  verison information on the right
Fixed the alignment of the footer

|WEB|
[/common/site.php]
* The footer's alignment for the left and right sides has been fixed