added 'plug_check_deps' into scala
Merge branch 'master' of github.com:ekalinin/envirius
moved logic for DEBUG env var inside main nv function (so, debug works now)
fixed tests
improved 'mk': clear env dir if configure failed; more debug messages
added plugin for 'haskell-platform' (linux only)
fixed test for ls-plugins
added sbt installation into scala plugin
Merge pull request #8 from em-/master

improved error handling for the `nv mk` command
Merge branch 'master' of github.com:ekalinin/envirius
fixed rust-plugin
fixed rust-prebuilt plugin
added tests for 'mk' without version
Update README.md
Update README.md
Update README.md
Update README.md
Added TOC into README.ru.md
common: Add a way to retrieve the distribution name

Rely on the recently-standardized /etc/os-release metadata to detect the
current distribution/OS vendor.
mk: Handle .tar.bz2 by telling tar to autodetect the compression type

Use the -a flag for tar instead of the -z flag to let tar autodetect the
compression type by filename extension.