Add build, ShellCheck, doctoc & jsonlint test on Travis CI
Add build, ShellCheck, doctoc & jsonlint test on Travis CI

hackmdio/hackmd,jackycute/HackMD,PeterDaveHello/hackmd,PeterDaveHello/hackmd,hackmdio/hackmd,jackycute/HackMD,hackmdio/hackmd,Yukaii/hackmd,PeterDaveHello/hackmd,Yukaii/hackmd,Yukaii/hackmd,jackycute/HackMD