Documentation Update
Language update
Extend PlugIn API
3.1.1405
We should not set BuildRequires in opencpn.spec.in
  It's not required because our source is built by cmake
  The requirements are different on OpenSuSE and breaks rpmbuild
PACKAGE_DEPS is not required for rpm, CPack does it just right

  This change avoid breaking diferent Fedora & OpenSuSE versions
CZ translation update
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN