Let's be Mono friendly

This is a massive overhaul that replaces System.Data.SQLite with Mono.Data.Sqlite. This should make it more compatible with Linux and Mac and has no known downsides for Windows.

packages/Mono.Data.Sqlite.Portable.1.0.3.5/tools/uninstall.ps1

@@ -0,0 +1,25 @@
+param($installPath, $toolsPath, $package, $project)
+ 
+    # Need to load MSBuild assembly if it's not loaded yet.
+    Add-Type -AssemblyName 'Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
+
+    # Grab the loaded MSBuild project for the project
+    $msbuild = [Microsoft.Build.Evaluation.ProjectCollection]::GlobalProjectCollection.GetLoadedProjects($project.FullName) | Select-Object -First 1
+
+    # Find all the imports and targets added by this package.
+    $itemsToRemove = @()
+
+    # Allow many in case a past package was incorrectly uninstalled
+    $itemsToRemove += $msbuild.Xml.Imports | Where-Object { $_.Project.EndsWith($package.Id + '.targets') }
+    $itemsToRemove += $msbuild.Xml.Targets | Where-Object { $_.Name -eq "EnsureMonoDataSqlitePortableImported" }
+  
+    # Remove the elements and save the project
+    if ($itemsToRemove -and $itemsToRemove.length)
+    {
+        foreach ($itemToRemove in $itemsToRemove)
+        {
+            $msbuild.Xml.RemoveChild($itemToRemove) | out-null
+        }
+        $project.Save()
+    }
+