Add bower to devDependencies

This relates to the change here: 7bbccd5c4fc12c67f1be0e043c0ba36ba26497fd
CI on Jenkins needs a local version of bower for the npm postinstall script
Merge pull request #14 from jdelight/fix-dependencies

Add bower to devDependencies
Use UTC internally

The value for Today is still in local time, but all other dates are in
UTC. If local time is required, it can simply be converted using
moment.local() when reading out the dates.
Merge pull request #17 from larister/use-utc-dates

Use UTC internally
v1.0.0
Added version script
Add basic plugin support
Add the time support plugin
changed demo order to allow for time picker dropdowns
added modular css styles
ensures default time is set silently and doesn’t trigger “startDateSelected” or “endDateSelected”
adds tests for edge cases
adds tests for time format validation
adds a refresh event to which allows plugins to update the calendar and input field
removed duplicated css
added non time specify presets
adds a data-time boolean attribute to presets which helps to determines whether the preset is time related
open or closes the time support panel depending on whether time support is required in the preset
ensures UTC is used when updating the calendar date
updated calendars after preset selected