Initial commit with Wiki Java API
Topic expansion components
Caching component for Wikipedia articles' revisions and contents.
Bugs fixed.
Added Serializable to super classes.
Bad cache
Finalized caching module
Fixed Range<Calendar> toString method
Changed to getInvalidInstance() in WikipediaArticle(String title)
Refactored entity generation as a series of generators with shared
interface.
Fixed bugs in expanding keyterms, ready to generate all caches.
Updated pom with renamed main class
Restructured interfaces.
Per-topic caching and removed unused dependency.
Fixed period range ending time to latest instead of current.
Added OutlinkAnchor, InlinkAnchor, BoldText expanders and more.
Added expanded-keyterms.tsv result