Merge branch 'hotfix/3.0.3'

* hotfix/3.0.3:
  (#548) Remove creation of Chocolatey Install Directory

Merge branch 'hotfix/3.0.2'

* hotfix/3.0.2:
  (build) Fix truncation of prereleaselabel
  (build) Sign the bootstapper file
  GH-537: do not install latest version of chocolatey
  GH-536: remove empty spaces from ArgumentList

(build) Handle null value for PreReleaseLabel

Depending on what branch is in play, the PreReleaseLabel may not
contain a value, as such, we need to handle when this hasn't been set,
and only attempt to grab a prerelease value when there is known to be
one.

Merge branch 'release/3.0.0'

* release/3.0.0: (29 commits)
  (build) Be more specific about how to run NuGet
  (doc) Fixed typo in about_boxstarter_bootstrapper (#505)
  (maint) link boxstarter.org repository
  (maint) crlf in Markdown files!
  (build) Get NuGet restore step working
  (#503) Remove website from repository
  (maint) Add .DS_Store file to .gitignore
  (build) Switch back to assembly version number
  (build) Use rc prerelease label
  (build) Minor tweak to asserted versions
  (build) Update VCS Root name
  (build) Add additional settings for GitVersion
  (build) Switch to using packageVersion
  (maint) Remove unnecessary files
  (build) Add missing Kotlin import
  (build) Add publishing of artifacts
  (#448) Use Choco to create NuGet packages
  (#448) Add extra metadata to nuspec files
  (maint) Remove build steps that aren't required
  (build) Fix passing of build counter
  ...

(build) Switch back to assembly version number

The ModuleVersion in the psd1 needs to be a System.Version object, so
we can't use the semantic version number that is used for the package
version number.

This commit reverts back to previous behaviour before a change was made
during automating the build through TeamCity.

Merge pull request #445 from mwallner/GH-444

(GH-444) Refactor code around Boxstarter specific parameters to make it clearer

Merge pull request #445 from mwallner/GH-444

(GH-444) Refactor code around Boxstarter specific parameters to make it clearer

(build) Fix release notes

(build) Fix release notes

(doc) Powershell -> PowerShell