Make subdirectory under .gtkvm
Use given directory parameter
Make gtkvm directory in advance
Reduce scope of code block
Reuse already cloned jhbuild
Make template config file on bootstrap
Extract bootstrap code
Add constants
Add helper method to get config directory
Fix a typo
Add method to load configuration
Extract code to detect configuration directory
Fix typos
Register gtkvmset name to configuration file
Arrange order of require
Implement list gtkvm subcommand
Add clean command
Extract clean command
Add dependency to colored gem
Fix dependency to runtime