Merge pull request #5 from jrhdoty/master

add function for monitoring a user and for monitoring a users most recen...
remove popup.html and begin work modal
remove popup.html
remove popup.html generated from merge
add communication from background.js to contentscript.js
add ability to toggle modal
close modal on click off
refactor modal toggle
update variable name
refactor contentscript
restyle modal
add listener for esc key
add blur to background on modal open
add modal animation
refactor set time to use window.getComputedStyle
update modal styling
add user view to modal
style userview
add styling to textfield
style button