coursera: add my review for guess_the_number prj
add a project for checkio tests
 add second example from checkio.com: a median numbers of an array
change received and sent values in sms message
add an example of a text util, for ammo1
next example from CHECKIO.COM, strong password. Done
add to checkio test for password non alpha-num test
add to checkio test of letters statistic
checkio: add one more example of how to count leters in password
checkio: rename files with correct numbers and prefix
Coursera: add exam 3, guess_the_number. Update info, how to use simplegui offline
cleanup
clean up
net_control changes in password settings
check_dropbox: changes in password settings
clean up