add friday problem set and fix print_function
new satellite code
first modis notebook
add modis manual
fixed typo
friday notebooks
Merge branch 'master' of a301:a301-teaching/classcode

* 'master' of a301:a301-teaching/classcode:
  fixed typo
satelliteII checkin
add solution to inverse planck
satellite3 notebook
satellite4 for Friday Sep. 26
thumbnail
fixed imports
hydrostat and tucson_elevation
problem for friday
fix image
added hint
add transmission script
friday notebook
satellite flux solution