Release v0.7.0

• Now tsuquyomi uses vim8's job functions, so vimproc is not required for vim8 users.
• New options:
  • g:tsuquyomi_single_quote_import : allows single quotes in import expression by :TshImport.
  • g:tsuquyomi_javascript_support : if set, tsuquyomi is enabled for JavaScript files.
  • g:tsuquyomi_ignore_missing_modules: if set, Tsuquyomi will ignore any error that starts with "Cannot find module".