v4.0

Main changes:
#192 Cities combo box improvement
#208 API services monitor
#201 DB connection information
#209 E-mail server, internet monitor
#202 Registration date
#238 Wrong password
#41 Client Web-app
#245 Web Client-reservation
#63 Incoherence in worker employment
#260 Default language
#142 About
#282 Current build data and release data

Bug fixing and improvements.
Critical bugs fixed:
#199 Sequences
#213 Feed Administrator Data failing
#214 E-mail server connection check failing
#248 Not able to log in as the administrator

v3.0

Main changes:
#154 Cities TERYT
#117 CSV and PDF table
#60 Client lend history
#118 Client reservation and browse
#167 Raising technology stack to Java 13
#159 Common data base connection
#165 Min max password parametrization
#135 Settings - System Data

Bug fixing and improvements.

v2.0

Main changes:
#57 Internet connectivity worker
#31 Settings
#53 Reservation information in lends table
#121 Enter key listener in Login Panel
#42 Image view for books/volumes

Bug fixing and improvements.