paket update adds framework references, paket install --hard removes them

[agross]

I experience a slight inconsistency between install --hard and update.

With a git-wise clean solution, when I run paket update the MSpec package got updated (see #292, but unrelated to this issue). Because the MSpec structure hasn't changed I expect no changes to my csprojs. But paket added System.Core references for a totally unrelated library: Castle.Windsor.

diff --git a/roles/web/source/Web.IntegrationSpecs.Fakes/Web.IntegrationSpecs.Fakes.csproj b/roles/web/source/Web.IntegrationSpecs.Fakes/Web.IntegrationSpecs.Fakes.csproj
index 959f4f9..1725ad5 100644
--- a/roles/web/source/Web.IntegrationSpecs.Fakes/Web.IntegrationSpecs.Fakes.csproj
+++ b/roles/web/source/Web.IntegrationSpecs.Fakes/Web.IntegrationSpecs.Fakes.csproj
@@ -82,6 +82,9 @@
               <Private>True</Private>
               <Paket>True</Paket>
             </Reference>
+            <Reference Include="System.Core">
+              <Paket>True</Paket>
+            </Reference>
             <Reference Include="System.Xml">
               <Paket>True</Paket>
             </Reference>

Then, when I run another paket install --hard these System.Core references are removed again.

[agross]

Actually, it's an issue between install --hard and install:

• install adds the missing framework reference
• install --hard removes it