Issue #107 GVM doesn't work on Cygwin - fix
Prime the candidate folders in cucumber environment.
Rework installation step definitions.
Revert "Prime the candidate folders in cucumber environment."

This reverts commit d7e5d62d2d9ce0e6d8e48683c32434543a261c7c.
Install a new local development version screnario implemented.
Fix typo in local development versions feature.
Mount test dir on random base on setup of test fixture.
New feature: Attempt installing a local development version that already exists.
New feature: Uninstall a local development version.
New features: Set a local development version as default or in use.
Merge pull request #109 from michalbcz/master

Issue #107 GVM doesn't work on Cygwin quickfix
Clean up pull request.
Apply pull request changes to selfupdate script.
Code style tweaks in install and selfupdate scripts.
Bug fix on setting up etc folder during installation process.
Bug fix: repair stray config in ext folder. Include feature file.
Use uname to determine operating system with -o switch.
Differentiate between install and selfupdate in audit logs.
Ensure that etc/config is primed on initial installation.
Remove obsolete unsets from install and selfupdate scripts.