moved class Article to article package
added dependencies xwiki-platform-search-lucene and celements-search
interface IAcrticleEngineRole added
basic ArticleSearchQuery added
ArticleLoadException added
BlogService.getArticles() implemented
ArticleEngineLucene implemented
updated dependency celements-search to 2.0-SNAPSHOT
using new LuceneSearchService
ArticleSearchQuery changed to ArticleSearchParameter
changed ArticleSearchParameter to use mode enums
added more constructors for ArticleLoadException
constants added for certain properties in BlogClasses
empty ArticleEngineHQL added
article engines added to components.txt
subscribed blogs list changed from spaceRef to docRef
added methods to BlogService: getBlogConfigDocRef, getBlogSpaceRef,
isSubscribable, getSubribedToBlogs
added tests for BlogService
BlogCreated-/-Updated/-Deleted events and listeners added
ClearBlogCacheListener implemented