Merge pull request #8 from asceth/master

Updating gems
Only run the chart JS when viewing the index page.
Update Sinatra from 1.4.4 to 1.4.5
Ugly relative and contextual placement to avoid use of centering, as Chrome and FF treat centering differently.
Correct 4-digit hour placement.
Slightly better hour placement.
Strip whitespaces, now we're cookin.
Make chart work even if base url lacks trailing forward slash.
No longer count filtereded exceptions in the bar chart.
Include newly used field.
Get that logic right for finding unfiltered exceptions.
Show the exception name properly. Fixes issue #10.
if request params are nil on filter creation, do not error via RequestParameters