first implementation of the douglas rachford demo, signals implemented and folder containing png for signals created
still building the demo
merge fix_all into demo_dr
demo nearly finished
Merge branch 'fig_prox' into demo_dr
display only one figure, relative path added for the signals
changed maxit
Merge branch 'fig_prox' into demo_dr
some fixes
fixed tests and added a TODO
updated setup.py and put demo douglas rachford in a func
doc fix
Merge branch 'grad' of github.com:epfl-lts2/pyunlocbox into grad

Conflicts:
	doc/tutorials/cs_dr_convergence.pdf
	doc/tutorials/cs_dr_results.pdf
	doc/tutorials/cs_fb_convergence.pdf
	doc/tutorials/cs_fb_results.pdf
	doc/tutorials/simple_convergence.pdf
	pyunlocbox/demos/demo_douglas_rachford.py
added __init__ for demos
Merge branch 'grad' of github.com:epfl-lts2/pyunlocbox into grad
balise fix
import fix
fix indent
Merge branch 'grad' into fig_prox