Merge pull request #5 from jayvdb/pypiname

setup.py: Fix package name

retry when response status code is 500

bugfix: when response content-type is not specified, and this url is external link, it should be considered as external other than IGNORE

load all headers config from config file

some links can not be visited with HEAD method and will return 404 status code, so we shall recheck with GET method.

update README

add report background color

update README

fix: print version

update default config

change --save-results parser

fix dependency_links

bugfix: make compatible with jenkins-mail-py

change mail helper