Fix the handout link in lesson1 slides.
add setup github upstream section to lesson 2.
Set a more realistic scope for the first class, add homework
Reading is good!
Carried over excess content from class 1 into class 2. Cut out the travel blog lab.
Moved the In Class Labs associated with the first lesson to lesson 2
Add some reference links on lesson2
add hyperlink and img tags in lesson2.
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.