Merge branch 'release/v0.1.1'
Merge branch 'develop'
Added support for creating docs through yard
Merge pull request #1 from skk/develop

Merge branch 'develop' of github.com:skk/simple_virtual_machine into dev...
Added .rvmrc file
Removed blank lines.
Corrected (some) issues reported by rubocop.
Removed global variable Tracing; moved to class variable.