Merge pull request #181 from scriptcs/dev

Ship v0.3.0
Merge branch 'dev'

* dev:
  Update version to v0.3.0
Manually specify the dependency version numbers in chocolateyInstall.ps1
Increment version number to 0.3.1
Merge pull request #190 from jrusbatch/issues/159

Manually specify the version number for dependencies in chocolateyInstall.ps1
Merge branch 'master' into dev

* master:
  Increment version number to 0.3.1
  Manually specify the dependency version numbers in chocolateyInstall.ps1
NuGet PowerArgs package updated.
Chocolatey install updated to mention new PowerArgs version.
Fixes #189. Merge branch 'issue189' into dev
Merge pull request #192 from denis-mentey/dev

PowerArgs package update
Fixes #193. DirectoryCatalog is not initialized if script name isn't passed.
Merge pull request #194 from denis-mentey/dev

DirectoryCatalog is not initialized if script name isn't passed.
Added save command to -clean and -install (if no packages.config)
Added assertions on Commands.Count for CompositeCommands, changed to ShouldImplement instead of casting
Merge pull request #199 from khellang/command-chaining

Added save command to -clean and -install (if no packages.config)