Readme: ref to wiki and more details about allowed markdown
Autocomplete tags and notebooks in metadata block
Add auto_complete triggers
Merge branch 'autocomplete' into devel

Conflicts:
	sublime_evernote.py
Autocomplete triggers are OS agnostic
Bugfix: find_syntax
Status bar shows created/updated info
Rename "Create new note" to "New note" in palette
Trigger autocomplete when doing New note
Add setting `evernote_autocomplete` to switch autocompletion on/off
Default evernote_autocomplete in settings
Minor (language codes in fenced blocks)
Better scoping of clear_cache
Small refactoring of metadata header generation
Shorter installation instructions
Readme: document clip command and disclaimer metadata
Acknowledge @paki
Readme: clip in main features, wiki links
Readme: document autocomplete
Readme: What's new section