Refactor App Handlers

[montlebalm]

This PR refactors the AppHandlers code and related tests. Its intent is to speed up the necessary tests and remove the unwanted ones (~1,300 loc). The changes to the library are minor and should retain all prior functionality.

Changes:

• Clean up formatting of source
• Remove unnecessary tests
• Add new appropriate tests
• Rename test sections to be more clear
• Speed up tests

Minor additional changes:

• Moved preamble to header template
• Simplified F2.log()

Please double check my changes to src/lib/app_handlers.js and F2.log() to make sure I didn't alter existing functionality. Also, if possible, please pull down this branch and look over the AppHandler tests. See if there's anything missing or if any of the test cases should be moved around.

[markhealey]

Liking what I see on first pass. Thanks @montlebalm.

What about this F2.log business? It's had a storied past: #91, #123, #143. Do we keep it in 1.5?

[markhealey]

Do we keep F2.log in 1.5?

I meant to ask should F2.log be dep'd in 1.5? It could be replaced with proper exceptions and/or console statements as needed.

[montlebalm]

Thanks @markhealey for taking a first look. I put ~8 hours of work into it, so it might take a little bit to fully review.

I think depreciating F2.log would be smart unless we want to expand its role. It doesn't seem that useful if we're just wrapping the console.

[montlebalm]

@markhealey @brianbaker ok to merge?

[brianbaker]

Overall I think this is looking good, except for the two notes I added inline in the code.

[montlebalm]

@brianbaker I made some changes to fix the issues you pointed out. See anything else?