Rename memory instructions; Rework constant handling (#177)

* Rename memory instructions as proposed by the bulk-memory-operations spec.
* Rename memory manager functions to memory.* as well
* Remove automatic inlining of constant globals (Binaryen does this now)
* Improve 'const' enum compatibility
* Improve module-level export generation
* Enable the inline decorator for constant variables
* Add ERROR, WARNING and INFO macros that emit a user-defined diagnostic
* Reintroduce builtin decorator so these can appear anywhere in stdlib again
* Inline isNaN and isFinite by default
* Make an interface around gc.* similar to memory.*
* Emit an error when trying to inline a mutable variable
* Slim down CI stages
* Add a more convenient tracing utility for debugging
* Implement some prequesites for an eventual bundled GC

tests/compiler/class-with-boolean-field.optimized.wat

@@ -1,8 +1,8 @@
 (module
  (type $i (func (result i32)))
  (memory $0 0)
- (export "test" (func $class-with-boolean-field/test))
  (export "memory" (memory $0))
+ (export "test" (func $class-with-boolean-field/test))
  (func $class-with-boolean-field/test (; 0 ;) (type $i) (result i32)
   (i32.store8
    (i32.const 0)