* develop: (962 commits)
  change log.debug to log.info for sanity_check_commands
  run 'python setup.py sdist' from correct directory
  make tests more robust against running headless
  run framework test suite on installation from sdist source tarball to catch packaging issues
  fix packaging issue with non-Python scripts in easybuild/scripts
  use setvar in modules.py to define environment variables
  don't specify modules tool/syntax to use, bootstrap should get it right by itself
  enable debugging of bootstrap script
  only emit debug message on module syntax if $EASYBUILD_MODULE_SYNTAX is defined
  use correct module syntax in bootstrap script if Lmod is not used
  export env vars to be picked up by bootstrap script
  re-enable 'eb --version' check after bootstrap
  export env vars to be picked up by bootstrap script
  bump version to 3.1.0.dev0
  fix remark in v3.0.0 release notes
  bump version to 3.0.0, update release notes
  bump version of bootstrap script (missing in easybuilders#1984)
  bump Lmod test version to 6.6.3 since 6.6.2 was removed, also test against Lmod 7.0
  bump Lmod test version to 6.6.3 since 6.6.2 was removed
  include tmpdir in RPATH filter via tempfile.gettempdir()
  ...