kyoto-tycoon: find non-/usr/local lua
raptor 2.0.14

Closes #29255.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gmp 6.0.0a

Closes #28502.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gmp: use ftpmirror.gnu.org

Primary gmp download site is pretty slow.
gmp: update 6.0.0a bottle.
sbt: use recommended defaults

Default brew install of `sbt` easily runs out of memory.

The addition of the flags `-Xms512M -Xmx1536M -Xss1M
-XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256M` can prevent this
from happening.

http://www.scala-sbt.org/release/docs/Getting-Started/Setup.html
http://stackoverflow.com/questions/15957183/outofmemoryerror-from-sbt

Closes #28815.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Update to highlight 3.18
highlight: add 3.18 bottle.