Enhancements

• Asynchronous operations: save/update/load from server does not block the UI
• Warn on close if modified but not uploaded (warn_on_close setting)
• Added support for GFM tables syntax (#51, #58)
• Added support for strikethrough (#38)
• Added support for underline (see special syntax)
• Settings for default emphasis/unordered list marks
• Better support for Unicode (#52)
• CSS styling for inline code fixed (#53)
• Support for HTTPS for Package Control v3 users (see wiki)
• If search has one result open it directly (#65)
• Added evernote_has_guid context key
• Search command now supports snippets for prompt (#54)