Add support to exclude files from CommonCTest
Merge pull request #118 from tribal-tec/master

Add support to exclude files from CommonCTest
GitExternal: Do not fetch if we are already on the correct tag
Merge branch 'master' of https://github.com/Eyescale/CMake
Merge pull request #120 from eile/master

GitExternal: Do not fetch if we are already on the correct tag
Introduce and check for minimum compiler version
Merge branch 'master' of https://github.com/Eyescale/CMake

Conflicts:
	Compiler.cmake
CR #121
Merge pull request #121 from eile/master

Introduce and check for minimum compiler version
Merge pull request #119 from rdumusc/master

Set working directory for all cpp unit tests to the /tests directory.
Not overwriting the PROJECT_ISSUES_URL if already set.