Scaffold fillups, first round of basic unit tests for validations and associations for fillups.
Removes scaffold scss file
Adds controller tests for fillsups_controller for new action
Tests for fillups_controller for show and create actions.
Adds internationalization line to test_helper to remove obnoxious message from test readout.
Adds tests for fillups_controller #edit.
Adds tests for fillups_controller for update and destroy actions.
Modifies view fillups (index page) from table layout to slightly more appealing list layout
Changes fillup from having an odometer_reading field to miles_driven, for simplicity.
Adds calculate_mpg method for fillup
Adds chart.js bar chart for viewing most recent 10 fillup mpgs
Still has bug with chart - an additional partial bar is rendered in the chart for unknown reasons.
Adds labels to fillup chart, which now loads on page load rather than with a button click.
Adds some styling for each fillup record
Adds scss file for colors to use as mixin
Adds migration to change datatype of gas_price and amount_of_gas to floats instead of integers
Adds small other changes to wording, mostly inconsequential
Merge pull request #13 from mh120888/add-fillup

Add fillup