add all non-graphic, non norns-weaver dependant libs

[p3r7]

added all the generic libs from norns/lua/lib, except:

• graph and its derivatives: they depend on stuff not yet implemented is seamstress' screen API.
• ui, textentry, fileselect and listselect: all the UI stuff too tied to norns' screen & its limitations

all the rest should just work i guess. i'm not 100% sure about lfo, as it relies on the params API but i've included it nonetheless (should be easy to tweak to make it work).

also, couldn't add those 2 fns:

• util.trim_string_to_width (depends on _norns.screen_text_extents)
• util.time (depends on _norns.get_time)

also added the include fn as an alias to require in the config.lua as its omnipresent in norns' script (in place of require) and having this small alias makes porting norns scripts easier.

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also, please note that this switches back the name of the module table of util / tabutil from Util / Tab to util / tab. idk why you switched style initially. my understanding is that people tend to use an uppercase 1rst letter when the module defines a class and a lowercase for when it's all static fns.

[robbielyman]

I think I'm going to close this—things like the test suite don't belong at the moment. thank you for the spur to bring in more Lua though! I added the missing things from util, lfo,sequins and lattice. feel free to open another PR with others as you find yourself using them!