* add awesome_bot to check urls
* allow dupes
* make url checking dependent on commit message
* add web.archive.org to whitelist
cuz awesome_bot is having trouble with those links
* fix travis.yaml
* check urls
* need ruby
* another site to avoid
* check urls
* make regex more generic
* sudo deprecated
* make travis linter happy
check url
* try skip results
check url
* timeout was what was killing us
check url
* testing fixing urls
check url
* dont allow timeout
check url
* testing timeout
check url
* put fpb back
check url
* enable to check_urls on arbitrary files
check_urls:free-programming-books.md
* try again
check_urls:free-programming-books.md
* test again
check_urls:free-programming-books.md
* travis doesnt like :
check_urls=free-programming-books.md
* allow arbitrary number of files to be checked
check_urls=free-programming-books.md
* woops forgot to fix the trigger regex
check_urls=free-programming-books.md free-programming-books-en.md
* use for loop instead of xargs
check_urls=free-programming-books.md free-programming-books-en.md
* add documentation
* remove 2 ebook of [Linkers and Loaders], [Learn Python The Hard Way]. ref issue:#3091, #3062
* Add CONTRIBUTING file of chinese version.
* Format text, update some description
* translate contribution md file.
* Add open Issue ref link
* Update some description in CONTRIBUTING And CONTRIBUTING-zh file.
* Update some description of zh version CONTRIBUTING.
* format md code to pass Travis CI check
* Fix The Travis CI check issue
* Fix The Travis CI check issue
* Fix The Travis CI check issue
* format md file to pass TCI check.
