Import texmaker-4.0.4 as wip/texmaker.

Texmaker is a free LaTeX editor, that integrates many tools needed to develop
documents with LaTeX, in just one application.  Texmaker runs on UNIX, MacOS X
and Windows systems and is released under the GPL license.

This is based on PR pkg/48297 by nicro465 at student.liu.se, than you.
Now packaging OK on NetBSD/amd64 6.1 and pkgint says looks fine.
texmaker returned as 4.0.4.