Remove spidermonkey 1.8.0
URL no longer exists.
spidermonkey: use block-form of mkdir
spidermonkey180: use resource
Convert to sha1
Signed-off-by: Jack Nagel <email@example.com>
Clean up MacOS version method usage
Miscellaneous style cleanups
Homebrew is moving to SpiderMonkey 1.8.5.
Moving 1.8.0 to Homebrew-Alt in case someone needs it.