Implement function for version shortcuts to use latest version
Add test for function findLatestPhpVersion and fix bug of that function ;)
Merge branch 'feature/phpversion-shortcut' of https://github.com/GM-Alex/phpbrew into GM-Alex-feature/phpversion-shortcut

Conflicts:
	phpbrew
Merge branch 'GM-Alex-feature/phpversion-shortcut' into develop #252