Started at 349,880,038 allocations and 42s
- Switched to making `Symbol` in GOOS be a "fixed type", just a wrapper
around a `const char*` pointing to the string in the symbol table. This
is a step toward making a lot of things better, but by itself not a huge
improvement. Some things may be worse due to more temp `std::string`
allocations, but one day all these can be removed. On linux it saved
allocations (347,685,429), and saved a second or two (41 s).
- cache `#t` and `#f` in interpreter, better lookup for special
forms/builtins (hashtable of pointers instead of strings, vector for the
small special form list). Dropped time to 38s.
- special-case in quasiquote when splicing is the last thing in a list.
Allocation dropped to 340,603,082
- custom hash table for environment lookups (lexical vars). Dropped to
36s and 314,637,194
- less allocation in `read_list` 311,613,616. Time about the same.
- `let` and `let*` in Interpreter.cpp 191,988,083, time down to 28s.
* [goalc] macro expansion in integer constants
* working
* didn't break it yet
* support conditional compilation
* fix up some more small bugs
* fix duplicate evaluation of bitfield definitions
* paranoid
* clean up
* before int to float stuff
* before trying to eliminate the separate read and write maps
* partial fix for register issues
* add missing include
* begin support for v2
* export game text
* generate text files
* working text load
* fix windows
* add test and clean up game tests a bit
* load the right file
* add separate program to launch the data compiler
* add offline test script
