feat: JDK 7 first cut

- grab file from Oracle using special cookie
 - use regular choc to do silent install

JDK7/tools/chocolateyInstall.ps1

@@ -0,0 +1,40 @@
+$package = 'jdk7'
+
+try {
+  $IsSytem32Bit = (($Env:PROCESSOR_ARCHITECTURE -eq 'x86') -and `
+    ($Env:PROCESSOR_ARCHITEW6432 -eq $null))
+
+  # http://www.oracle.com/technetwork/java/javase/downloads/index.html
+  $url = if ($IsSytem32Bit)
+    { 'http://download.oracle.com/otn-pub/java/jdk/7u21-b11/jdk-7u21-windows-i586.exe' }
+  else
+    { 'http://download.oracle.com/otn-pub/java/jdk/7u21-b11/jdk-7u21-windows-x64.exe' }
+
+  $chocTemp = Join-Path $Env:TEMP 'chocolatey'
+  $tempInstall = Join-Path $chocTemp 'jdk7\jdk7installer.exe'
+
+  Write-Host "Downloading from $url"
+
+  # had issues with Invoke-WebRequest working properly
+  $client = New-Object Net.WebClient
+  $client.Headers.Add('Cookie',
+    'gpw_e24=http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html')
+  $client.DownloadFile($url, $tempInstall)
+
+  Write-Host "Download from $url complete"
+
+  $params = @{
+    PackageName = $package;
+    FileType = 'exe';
+    # http://docs.oracle.com/javase/7/docs/webnotes/install/windows/jdk-installation-windows.html#Check
+    SilentArgs = '/s';
+    File = $tempInstall;
+  }
+
+  Install-ChocolateyInstallPackage @params
+
+  Write-ChocolateySuccess $package
+} catch {
+  Write-ChocolateyFailure $package "$($_.Exception.Message)"
+  throw
+}