Send parameters to search_metrics_list for page, page_size

respect values if sent
Use shared json-get functionality for backends
Formatting, small display change for error messages in settings modal
Update spec error message for graphite
Update Sieste to v2 Vaultaire/Chevalier, shared get-uri code
If v2, use factor to reduce vault parts-of-seconds to whole seconds
Correct check-url functionality

 - use Net::HTTP since open-uri isn't available any more
Use metric as original string, not m, on v1 encode
temp hack for local installation
Update Gemfile to latest gems
Capture and error out on socketerrors for get_json
Use general "error" string in spec check
ergaerd, metrercs
use explicit error check since we now handle all the things
Move settings to far right, add padding
Use super method, helper param methods, to cleanup backend classes
cleanup spec with helper methods
Raise error if file not found when listing metric
Allow testing flag to test only older date ranges
Remove superfluous init code