Merge pull request #60 from mrwhelan/master

remove sloppy outlines from my previous pics
Update directory structure in first-program  and update status in README
Started Module 4
Merge pull request #61 from kariannemah/dir_structure

Update directory structure in first-program and update status in README
Updated Windows setup JDK images to JDK8
Change height exercise to centimeters instead of meters.
Added module 4 slides
Updated README
Merge remote-tracking branch 'upstream/master'
Remove unnecessary material from README
Move intro material suggestions to separate file.
Merge pull request #63 from bridgethillyer/master

Updated Windows setup JDK images to JDK8
Fixed image link
WIP improving module 4
Added more to module 4
Module 4 DONE like a BOSS
Started improving module 5
Rewrote module 5

Not completely happy with this. It feels like it needs a lot more, but I
am not fresh enough to do it right now
Update leiningen template
addendum to ssh-keygen command for 64-bit Win 7 users