Automark: first release

Simple plugin that automatically highlights current word (no hotkeys or so on):

![Automark](http://i.imgur.com/q6YyuN4.png)

Now I should touch 16 files, right? (remembered that magic number)
You're using a Unix-style platform, and there we tell the linker to export the symbols (as some are needed for Glade, and there isn't a simple portable way to only export some symbols), so it's not surprising it works for you.  However, it may break in the future if we change it as we don't maintain compatibility for it.

And yes, if you don't require decent regular expression support, just use [sci_find_text()](http://www.geany.org/manual/reference/sciwrappers_8h.html#a9f2c464f4d2875df99d0ca9ea3a4c48b)