update calendar with upcoming events

added short descriptions and linked to event brite pages
ignore .DS_Store and *~ files
replacing lorempixel with placekitten and placedog (loading issues)
adding some date and location placeholders to .jumbo.prime
Starting to fix responsive layout

moved @import to bottom of main.css (override custom styles with custom responsive)
added styles (mostly padding, margins, etc) for 640 wide and 960 wide
Moving @import bootstrap-min to main-responsive.scss

Importing bootstrap-min as the baseline for our custom responsive styles
additional fixes to responsive styles
Updating min-width of .event .date block to ensure short dates still have consistent block width
updated faq with some simple questions
link join to hackathon.io site
Updating line-height of faq page descriptions
move to hackerleague.org for registration
Content changes

Added correct time and location to featured heading section
Changed sub headers
use correct links for eventbrite eventes