Improved GLSL constructor expression test message

Improved the message for GLSL constructor expression tests by adding the
type expression to the message.
Notepad++ fixed some typos.

Fixed some types hinted by Notepad++.
sdk\tests\test-guidelines.md : Set the year in the licence text to 2014
Merge pull request #532 from TiborsHub/master

Improved GLSL constructor expression test message