Merge branch 'release-1.4'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'release-1.5'
Merge branch 'develop'
Merge branch 'release-1.6'
Add support for Windows 7

This PR add support for Windows 7 and so fixes #28.
Merge pull request #29 from pandrew/windows7

Add support for Windows 7