Adding a generic log function

[nfurfaro]

This PR

• uses the __is_reference_type and __size_of intrinsics to use either log or logd internally.
• deprecates the type-specific log functions, ie: log_u64, log_b256, etc
• Adds a logging module and reorgs the lib a little to bypass this blocker: Explicit ordering of dep statements is required to resolve dependencies. #409
• preserves a bare chain module to prevent breaking everything that uses chain/auth (this feels a bit hacky... probably better to keep it clean, remove the chain mod and force users to update the path.)

close #1358
close #823

[nfurfaro]

I see that removing module chain altogether has caused some issues with imports.
working to fix that now.

[nfurfaro]

Ahh. I should really add more tests, there's only one existing atm :)

[nfurfaro]

After #1573 lands I'll merge master re-push this.

[sezna]

LGTM!