Add TeamCity module to the repository.
Report current psake task in TeamCity.
Attempt to fix the include of the TeamCity module.

Perhaps using a full path will fix it on TeamCity? Weirdly, the
teamcity.psm1 file is opened in an editor on my machine when I run this.
All a bit strange.
Fix include of TeamCity functions.

For some reason, psake isn't happy Include-ing PowerShell Module (.psm1)
files. Renaming to .ps1 fixes the problems.
Wrap the task name in single quotes.

Might make it a bit more obvious what the task name is.
Merge pull request #11 from alastairs/teamcity-improvements

TeamCity improvements: output the currently-executing psake task.