Merge pull request #2 from piti118/master

cauchy and breit wigner
Merge pull request #3 from piti118/master

	 analytically normalize relativistic breit-wigner
Merge pull request #4 from piti118/master

	 update convolution documentation
Merge pull request #5 from piti118/master

	 change add2pdfnorm to addpdfnorm that take arbitary number of function
Merge pull request #6 from piti118/master

	 add Simultaneous Fit and refactor plotting(need more refactor though)
Merge pull request #7 from piti118/master

fix remove_prefix on None prefix
Merge pull request #8 from piti118/master

fix keyword argument in chi2regression.show
Merge pull request #9 from piti118/master

rename breitwigner to rtv_breitwigner to avoid confusion
Merge pull request #10 from piti118/master

bump version change doc theme to rtd
Merge pull request #11 from piti118/master

add default_errordef and remove a couple deprecated oneshot
Merge pull request #12 from piti118/master

bump up version
update readme
Merge branch 'master' of github.com:iminuit/probfit into iminuit-master
pep8 and import missing warn
Merge branch 'master' into iminuit-master

Conflicts:
	probfit/plotting.py
user lightbox
Merge branch 'master' into iminuit-master
revise banner and header
fix readme deadlink
move website