add xobjectPageTypeCache
replace log4j logger with slf4j logger in TreeNodeDocument listeners
fix monitor counting in prepareVelocityContext
add missing licenses
add XObjectPageType document events and event converter
add XObjectPageTypeDocument event listener as copy of TreeNodeDocument
event listeners
Merge branch 'dev' into feature-pageTypeCache
Merge branch 'dev' into feature-pageTypeCache

Conflicts:
	src/main/resources/META-INF/components.txt
extract PageTypeProperties field names to constants in
IPageTypeClassConfig
fix error logging
implement XObjectPageTypeDocument listeners
implement XObjectPageTypeCacheListener
extracted name constants
XObjectPageTypeCache stores now unmodifiable lists
implemented WebUtilsService.getWikiRef()
getters with WikiReference added to PageTypeClassConfig
corrected wiki for "getPageTypePropertiesClassRef" calls in listeners
added WebUtilsService.getWikiRef()
refactored XObjectPageTypeCache to WikiReference instead of String as
key
removed getters with String in PageTypeClassConfig