Checking in changes prior to tagging of version v0.10.0

v0.10.0 (2019-04-27)

• drop mitchellh/go-homedir dependency #122 (Songmu)
• introduce Go Modules and adjust releng files #121 (Songmu)
• Add a dummy CVS backend to recognize and skip CVS working directories #115 (knu)
• add -l option on get command which immediately look after get #112 (kuboon)
• add support for Fossil SCM #98 (motemen)
• Use parsed username also with ssh for Git #101 (jjv)
• Add ghq.completeUser config to disable user completion of ghq get #118 (k0kubun)
• ghq get --vcs= #72 (motemen)
• warn if executable was not found when RunCommand #70 (motemen)
• support meta name="go-import" to detect Go repository #120 (Songmu)
• support refs which start with URL Authority in ghq get #119 (Songmu)