made the aggregation function more general and added a specific implmentation for yearly aggregate values.
added ability to construct growth curves, closes #1
restructured the internal query logic to speed up queries about growth curves a bit. right now there's a huge slow down because the agent's leaving date is in a separate table that must be searched for each agent by its id.
updated name of sim time info table
updated queries to check equality rather than likeness
simplified the fac range query listing and provided some speedup (user time from 17s to 6.5s on the inpro case
speeds up growth curves enough to be minimally viable
added a gitignore
adds ability to query facility numbers and produce growth curves. speed is relatively slow, but acceptable for the current time. closes #1/