Makefile reorg to speed things up a bit

Add more .PHONY annotations to avoid unneeded
file target searches.

Reorder the 'make stylish' target hit the fast
stuff first. Move the glade checks to 'stylish harder'
and tie it to 'make jenkins' so only ci checks run it
by default now.

Add a 'make stylefile' target that echos the list of
files we style check, for use in adhoc checks.
Add a 'install-pip-requirements' target

Make the 'jenkins' target run the pip install
target. This should make bootstrapping a working
dev/test env easier.