Fix emacs modeline.

Change-Id: I56aa8c6e5da4d682a932af4e57404a870c13c231
drawinglayer: Improve the README.

Change-Id: I40ae115a03f1a289c940f9f96e3d496d1eba1a48
svx: Update the README wrt. the SdrObject(s).

Change-Id: I3803b46a999a0c796b5cbc3da9c39c67d608bc0c