Add basic gdbinit

Signed-off-by: Varun Shastry <vshastry@redhat.com>
Add gluster specific gdb functions

Signed-off-by: Varun Shastry <vshastry@redhat.com>
Add screenrc

Signed-off-by: Varun Shastry <vshastry@redhat.com>
Add gitconfig

Signed-off-by: Varun Shastry <vshastry@redhat.com>