Merge branch 'master' into ab-debian

Merge branch 'master' into ab-debian

* master: (88 commits)
  fixed typo in installer and other minor improvements
  updated configs.signatures
  compatibility fixes at the installer
  fix lxc-attach not exiting after starting netdata
  colorful netdata-installer.sh; splitted certain functions for adding makeself; netdata-uninstaller.sh and netdata-updater.sh are now generated even when netdata-installer is called with --dont-start-it
  Fix license name
  Fix license name
  Support older autoconf versions
  when version.txt and internal version differ, use the internal one
  properly show version and check version using the internal version string too
  do not compile netdata twice on travis
  information at web_log.conf
  show netdata version at the dashboard
  Update /charts at API definition.
  web_log plugin: support for additional log format added
  properly reset charts after max time of refreshes; fixes #1631
  do not discard old data on algorithm mismatch
  improved dashboard information about web_log charts
  updated configs.signatures
  web_log fixes and improvements
  ...