DRY up data methods on DB model
Added seperate methods for data retrieval based on type opf request
Change records controller to call pdf  method than graph method
Friendlier date and time format inside PDFs, can now pass data methods a strftime format as argument for custom return
Add GlucoseAmigo logo to pdfs, refactor other contents
Add optional argument to PDF data model
working x axis for graph
working charts with properly formatted x axis
working graph
it works!!!
Merge pull request #94 from banana-slugs-2014/high_chart

Suck it High chart!!!!