WIP: rearrange the compiler into separate phases

[matthewmueller]

phases look like this:

load => index => parse => assemble

• load: load the program and type check (heavy lifting done by golang's loader)
• index: shallow walk through the list of all declarations to gather and organize information about them
• parse: deep walk through the declarations we reference, using the index to add dependencies and build a dependency graph (DAG)
• assemble: takes that DAG, sorts it and assembles the declarations into actual javascript files.

[matthewmueller]

this was a total fail, i feel like i made the logic flow more obscure and was bitten by a bunch of cyclical imports. i may use this for reference since there are some nice things, but going back to old architecture for now, which is a bit messy and verbose but easy to follow the flows.