plugin_plus_py8 branch

​https://code.launchpad.net/~maddevelopers/mg5amcnlo/plugin_plus_py8/+merge/303947

report	status	assignee		report	status	assignee
1	X			2	X
1.1	X			2.1	X	OM
1.2	X			3	X
1.3	X			3.1		VH+SP
1.4	X			3.2		VH+SP
1.5	X			4		VH+SP
5	X	OM		6	X	(MA5)
7	X	(MA5)		8	X
9	X	OM (MA5)		11	X	OM
10	X	(MA5)		12	X	OM
10.1	X			13	X
10.2	X			13.1	X	OM
10.3	X			13.2	X	OM
10.4	won't do in this rev.			13.3	X
14	X	VH		13.3.1	X	(MA5)
15	X	OM		13.3.2	X	OM
16	X	OM		13.4	X	OM
17	X			13.5	X	VH
18	X	VH		19	X
18.1	X			20	X
18.2	X			21	X
18.3	X			22	X
23	X	VH		24
25				26	X
27	X			28
29		(MA5)		30		OM+VH
31	X	OM		32	X	OM
33				34		(MA5)
35				36		VH
37	X	OM		38
39	X	(MA5)		40	X	OM
39.1				41	X	OM
39.2				42
39.3				43		(MA5)
44	X	(MA5)		45
44.1	X	(MA5)		46
44.2	X	(MA5)		47	X	OM
44.3	X	(MA5)		48	X	OM
44.4		OM (MA5)		49
50				51

Comment on #17:

1. VH: (PY8 output is anyway broken with latest PY8 version)
2. OM: PY8 output was working... this is actually correct to remove that makefile! (so I restore it)
3. OM: Therefore PY8 IS working