fix warning about potential NPE in PasteCommand#getCloneURI

Change-Id: If9a1399e98284cd9dfc99b0278470af116026b08
export all packages in org.eclipse.egit.ui

Change-Id: I7f5c14a9f26023ea66bd5deda43d7ca824d633ba
Merge "fix warning about potential NPE in PasteCommand#getCloneURI"
Merge "export all packages in org.eclipse.egit.ui"