Convert CompilerAPI.compile method to consume and produce iterators

[fubuloubu]

Elevator pitch:

Change the methods to consume and produce iterators, so that files can be compiled in batches

Value:

It would then be possible to compile a set of files and issue warnings if they fail to compile, so that the rest of the project can be compiled without the failure stopping execution. It will also lend itself well later if an async compile process is chosen.

Dependencies:

Design approach:

Task list:

• Tasks go here

Estimated completion date:

Design review:

Do not signoff unless:

• 1. agreed the tasks and design approach will achieve acceptance, and
• 2. the work can be completed by one person within the SLA.
     Design reviewers should consider simpler approaches to achieve goals.

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