use passthru so that the results of the command are displayed during execution

This aids in diagnosing errors where composer halts, or is very slow
Also update libraries during vagrant up or provision

fixes #24
Merge pull request #26 from mfairchild365/issue-24

Also update libraries during vagrant up or provision
Merge pull request #23 from mfairchild365/scan

Add auditing support
record the points_available to the db

This will allow the value to be customized
Add a method to get the percent grade for the metric
Calculate grades with the new points_available field
Allow customizing the points_available in the example metric
Update tests to reflect changes
Add a new test to verify that customizing the points_available is working
Remove debug statement
Fix failing test
Add a test for getPercentGrade() and fix rounding error