move domain decomposition to mesh generator
remove tuple3 implies linspace in mesh.rectilinear
remove deprecated topology.elem_eval stack arg
remove topology.project/projection default ischeme
change Topology.elem_eval default separate=False
global rename 'coords' to 'geometry'
Merge branch 'master' into trilinos

Conflicts:
	examples/laplace
	nutils/topology.py
put maps in ArrayFunc.shape
simplify ExcInfo using linecache
move relevant FrameInfo code into constructor
replace ExcInfo by cleaner setup
separate source and context in cachable properties
move _find_classname to Frame._name
add util.keyboard
rename exception.py to traceback.py
add traceback.format_exc
name changes
ren log.traceback to stack, show call trace by def
move keyboard from util to traceback
fix frame source for decorated functions