Fix unicode error #483
Add new author
Port update_coreteam.py to Hy.
Added defmulti
Merge branch 'master' into pr/489
Merge branch 'master' into pr/487
Merge branch 'master' into pr/484

Conflicts:
	AUTHORS
Update copyright year in docs.
Fix up quoting keywords.

Fixes this:

=> :foo
'\ufdd0:foo'
=> `:foo
'\ufdd0\ufdd0:foo'
Merge pull request #510 from paultag/paultag/bugfix/fix-quoting-keywords

Fix up quoting keywords.
removed slice from builtin function from hy

hy previously overshadowed python's slice
added cut macro to core
replaced cdr slice with getitem slicing
replaced slice macro for getitem and slice for defmacro/g! and empty?
fixed slicing in rest function
moved cut to be a function rather than a macro so that it is in the core language

it will also evaluate slightly faster in the repl
added "cut" to the exports for language core
fixed examples for all instances in the documentation that previously used Hy's slice function
modified tests in language test to test cuts instead of slices
Merge branch 'master' of https://github.com/calembendell/hy