Log Message:
Import pluma-1.8.1 as wip/pluma.

pluma is a small and lightweight UTF-8 text editor for the MATE
environment. Based on gedit, the text editor for the GNOME2 environment.

pluma is part of MATE and uses the latest GTK+ and MATE libraries.
Complete MATE integration is featured, with support for Drag and Drop (DnD)
from Caja (the MATE file manager), the use of the MATE help system,
the MATE Virtual File System and the MATE print framework.