Add preliminary lua support to redbean

This change only implements enough Lua support to send a Hello World
response. The redbean executable size increases from ~128kb to 260kb
and the requests per second decreases from 1000k to 600k. That's the
fastest it can go and that's extremely impressive compared to Python

See #97

tool/net/redbean.lua

@@ -0,0 +1,7 @@
+send('HTTP/1.1 200 OK\r\n'..
+     'Date: ' .. date() .. '\r\n'..
+     'Server: redbean/0.1\r\n'..
+     'Content-Type: text/plain\r\n'..
+     'Content-Length: 7\r\n'..
+     '\r\n'..
+     'hello\r\n')