Add tab-switching commands
Add tab-switching commands

Add ":tabclose", ":tabedit", ":tabnew", ":tabnext", ":tabprevious",
":tabfirst" and ":tablast". These are just aliases for the
buffer-switching commands.

hlamer/kate,cmacq2/kate,DickJ/kate,sandsmark/kate,DickJ/kate,cmacq2/kate,hlamer/kate,hlamer/kate,sandsmark/kate,DickJ/kate,DickJ/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,cmacq2/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,sandsmark/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,hlamer/kate,sandsmark/kate