Standardise spelling

We have 12 instances of cannot and 4 of can't
This pull request standardises on cannot
Merge pull request #176 from brianteeman/patch-1

Standardise spelling
Adding updateservers to extension package
Changing version string
Update en-GB.com_localise.ini
Merge pull request #177 from infograf768/extensionpack

Adding updateservers to extension package