new numbered release

preparation for stable 1.11.21 release

updated ChangeLog with 1.11.19 entry

don't show not resolved ticket count where there are no such tickets

Merge pull request chilek#402 from jarecky/master

radiosector could have 360 degree width; add default prodid on invoices

1.11.17 released

LMS 1.11.16

Merge pull request chilek#222 from maciejlew/oop

Constructors, properties and methods visibility in new PHP5 style for some LMS base classes

worthy to have something like this after two year of development, but…

… before massive changes which go soon later

- 1.11.13 Dira