Documentation correction;
setRequiredFields improved
Documentation correction;
Documentation correction;
Code formatting
Documentation correction
readme.md descriptions corrected.
layout doc correction
Documentation improved;
close() modified to prevent warning if no session is started
Session class now implemented as singleton
SystemMessage no longer abstract
key implemented to improve security.
No need to explicitly call open() to start session, most methods will do it automatically.
calendar.js module alpha version implemented
calendar.js module alpha version implemented
calendar.js module alpha version implemented
calendar.js module alpha version implemented