fix: ComBaseTemplateHelperDate::format()

fix applies to the cases when 1st parameter is not a KDate instance
make OS dependent fixes

1. Make AnFilePathfinder properly handle both / and \ path separators
independent of underlying OS
2. Fix backslash in hrefs of <link /> tags generated by
LibApplicationTemplateHelperRender::style() on Windows environment
fix: Strict Standards

Only variables should be passed by reference
fix: make check for absolute path OS-independent
fix: toolbar action URLs
Merge branch 'master' of https://github.com/kulbakin/anahita into kulbakin-master
fix: if the plugin class doesn't exist then skip instead of calling methods on stdclass