Exclude packages from repository

(Machine.Specifications.0.4.9.0)
Exclude *.sln.sdsettings
Revert "Exclude *.sln.sdsettings"

This reverts commit c27db95b03e2edc32b6ed842addcf7c1be3dd095.
Merge pull request #480 from ddur/master

.gitignore /packages/