comment cleanup
separate DB from its interface DBI
better session cleanup, according to php manual
fix bad variable symbol
add debug mode to DB
somethin's borked
fixed DBI parameter passing error and improved debug mode
fix call to dbi method
shared tasks -> shared sessions; admin.js refactoring and new (working) assignment data parsing
I should remember that these things are broken.
refactor all sharedTasks-related items to sharedSessions