Enhancements to Rakefile and test files:
* make listing of all tasks the default rake task
* make test_helper responsible for loading the libs
* add description to rake tasks to make work the rake -T
* move the test files out of unit dir into the test/ dir
Merge pull request #22 from kobliha/master

Export/Import functionality
Merge pull request #24 from kobliha/master

Adapted to yast2-ruby-bindings =~ 1.2.0
Fix Rakefile and conflicts
Merge pull request #23 from vmoravec/master

Small enhancements to Rakefile and test files
Fix requiring test_helper
Ycp should be yast