Copy edited.
added functionality to support installArguments in packages.config

This Pull Requests add an additional attribute to the package.config named "installArguments".
This attribute basically does the same as you would provide the "installArguments" paramer
 to the "chocolatey install" command.
tests: fix Install-ChocolateyShortcut tests with non-default Chocolatey install path

Replace hardcoded C:\Chocolatey with $Env:ChocolateyInstall.
build tools: use 64-bit msbuild if present

This makes build.bat behavior consistent with that of test.cmd with
respect to bitness of PowerShell used to run tests.

Otherwise, test.cmd would run tests using 64-bit PowerShell, while
build.bat would run them using 32-bit PowerShell (via 32-bit msbuild).
build tools: fix building the nupkg with non-default Chocolatey install path

Replace hardcoded %systemdrive%\Chocolatey with %ChocolateyInstall%.
Merge pull request #361 from PeterMortensen/master

Copy edited.
Merge pull request #470 from yannisgu/installArgumentsPackageConfig

Added functionality to support installArguments in packages.config
teach Remove-BinFile to remove shim .exes

Additionally, print messages about nonexistent batch redirects only in
debug mode. Remove-BinFile does not know which method was used to create
the redirects and the messages are false positives if shimgen was used.
Besides, those messages are useless to the end user anyway.
Merge pull request #477 from jberezanski/shortcut-tests

Fixed Install-ChocolateyShortcut tests with non-default Chocolatey install path
Merge pull request #480 from jberezanski/remove-shims-upon-uninstall-stable

Improved Remove-BinFile to remove shim .exes when uninstalling a package
Merge pull request #479 from jberezanski/build-fixes

Build script fixes: hardcoded Chocolatey directory, use 64-bit msbuild
Merge branch 'stable'

* stable:
  teach Remove-BinFile to remove shim .exes