Use process_vm_{read,write}v instead of ptrace

This approximately doubles the speed of Dwarf Therapist on Linux, and
fixes #73.
more tweaks for #36, preference tooltips

- updated the preferences section in the unit tooltip to categorize and
give better descriptions so it's easier to pick out materials or food.
- updated the script filtering to properly look in specified categories.
eg gems could match both items 'large gems' or shapes 'gems'
- adding a filter from the preference dock gives a better description of
what the filter contains
- creatures are added to multiple lists in the role preference section
(eg. rats are trainable and hateable)
Merge pull request #76 from Hello71/process_vm

Use process_vm_{read,write}v instead of ptrace
fix errors from #76, remove obsolete plant names
Merge remote-tracking branch 'upstream/DF2014' into qt4-compat

Conflicts:
	inc/models/dwarfmodelproxy.h
	src/dfinstance.cpp