Fix the Effect class for PSMobile
Minor refactoring on Effect.cs to better memory usage
Missing change in last commit
Merge branch 'develop' of github.com:jalf/MonoGame into develop
Fix the  null reference exception on dispose shaders

fix missed empty collection usage
Merge remote-tracking branch 'upstream/develop' into develop
Merge branch 'develop' of github.com:jalf/MonoGame into develop
Merge branch 'develop' of github.com:jalf/MonoGame into develop
Merge remote-tracking branch 'upstream/develop' into develop
Fix PSM samples
Revert "Fix PSM samples"

This reverts commit b5e234121145080254e5d97a1ec9a7e584b1f872.
Merge pull request #1668 from jalf/develop

Fix the Effect class for PSMobile