Lute v3

Feature changes:

• Add Thai plugin! By @jaydom28 in #510. Will be released to PyPi separately.
• Add Thai definition and story, using the new Thai plugin.
• #12: Allow bulk set status in Term listing.

Tweaks:

• #140: keyboard shortcuts to move to prev, next sentences.
• #507: add --local startup flag to lute.main (disallows accessing from mobile devices)
• Show ‘text copied’ message in tooltip only.
• Only hold Shift down at start of text copy.

Fixes:

• #506: update stats if distribution is missing.
• #114: allow / in multiword terms from reading screen.