(maint) Correct PowerShell casing

Author: corbob

nuspec/chocolatey/chocolatey/tools/chocolateysetup.psm1

@@ -208,9 +208,9 @@ You need to restart this machine prior to using choco.
     } else {
         @"
 Chocolatey CLI (choco.exe) is now ready.
-You can call choco from anywhere, command line or powershell by typing choco.
+You can call choco from anywhere, command line or PowerShell by typing choco.
 Run choco /? for a list of functions.
-You may need to shut down and restart powershell and/or consoles
+You may need to shut down and restart PowerShell and/or consoles
  first prior to using choco.
 "@ | Write-Output
     }

nuspec/chocolatey/chocolatey/tools/init.ps1

@@ -1,4 +1,4 @@
-param($installPath, $toolsPath, $package, $project)
+param($installPath, $toolsPath, $package, $project)
 
 $modules = Get-ChildItem $ToolsPath -Filter *.psm1
 $modules | ForEach-Object { Import-Module -Name  $_.FullName }
@@ -8,7 +8,7 @@ $modules | ForEach-Object { Import-Module -Name  $_.FullName }
 Chocolatey
 ========================
 Welcome to Chocolatey, your local machine repository built on the NuGet infrastructure. Chocolatey allows you to install application packages to your machine with the goodness of a #chocolatey #nuget combo.
-Application executables get added to the path automatically so you can call them from anywhere (command line/powershell prompt), not just in Visual Studio.
+Application executables get added to the path automatically so you can call them from anywhere (command line/PowerShell prompt), not just in Visual Studio.
 
 Lets get Chocolatey!
 ----------