~jojo/Carth

ref: 1637b22ca36d9cbfbd72da5f47baeafb1e11fcc3 Carth/examples/std.carth -rw-r--r-- 1.7 KiB
Update std with undefined & panic functionality
Make Pair a builtin datatype
Disallow []. Add "case" keywords to match-expression to read better
Add basic import system. Basically C-style include