Author: Petr Skoda
book v1.5beta compatible with 1.9.1 or later, not 2.0dev
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c6d2eda2fbdecef9aafdac52f023be66cb438ac4
http://github.com/moodle/moodle/commit/c6d2eda2fbdecef9aafdac52f023be66cb438ac4
+ 2.3 en [book:import,book]
+ 2.3 en [book:print,book]
+ 2.3 en [book:exportimscp,book]