Hippie Autocompletion

Sublime Text 2/3 style auto completion for ST4: cycle through words, do not show popup. Simply hit Tab to insert completion, hit Tab again if you don't like it.

Features:

• fuzzy search
• supports multiple cursors
• expands abbreviations into combined_words for snake, mixed and camel case
• prioritizes previously chosen completions
• current view words go before other views words

TODO:

• prefer words closer to cursor?
• take into account scope/language word defined vs we are editing
• better support for multiple cursors, i.e. if primers differ
• obey word_separators setting to parse words
• shift+tab to cycle back? backspace to cancel?

Started from discussion here and based on sketch by LightsOut8008.