Adds initial migrations for tables.

A security has many pe ratios,
equity values, dividends paid out,
net earnings, and shares outstanding.

A year has many pe ratios,
equity values, dividends paid out,
net earnings, and shares outstanding.
Adds models for application along with
association helper methods
Adds rspec tests for model associations and initial validations.
Adds seed file for reading data in from excel spreadsheet
Adds index and show actions for resources controllers
-Adds postgres support
-Adds Securities Controller
-Adds tests for Securities Controller
Add json serializer for including associations
Adds performance table and deletes individual performance
metric tables
Adds api end points for performances and years.
Merge pull request #1 from hwhelchel/year_and_performance_controllers

Year and performance controllers