Always displaying first parameter discription in ParameterInfo tooltip

More information at https://github.com/icsharpcode/NRefactory/pull/390
Merge pull request #513 from DavidKarlas/patch-2

Always displaying first parameter discription in ParameterInfo tooltip
Fixed 'Bug 12911 - NUnit addin munges testcases containing data with dots'.
Merge pull request #515 from x2bool/bug12911

Fixed 'Bug 12911 - NUnit addin munges testcases containing data with dot...
Change Update Check to Every 1 Days
Merge pull request #517 from crdeutsch/patch-1

Change Update Check to Every 1 Days