CLC-3410 Move Finaid class to app/models/finaid
CLC-3410 Rename MyfinaidProxy->Proxy
CLC-3410 Put Finaid::Proxy in correct module
CLC-3410 Add TODO comments documenting future work to collapse duplicative models
CLC-3410 Fix references to Finaid::Proxy
Merge pull request #2235 from ctweney/clc-3410-5

CLC-3410 Fifth batch of proxy reorg: FinAid