change docId type to integer
WatcherThread: limit open file when indexing
client: terms view: show document occurrence
DocumentFactory: log to debug only
ThreadPool: add taskCount()
write directly to main index (no split index)
WatcherThread: log watch service type to debug log
beautify log
Terms: change posting list from hash set to array list
Terms: remove documentOccurrence and add addToDoc()
Terms: rename set to postingList
client: terms view: fix filter
Terms: PostingList: returns after add position
Terms: move PostingList to separate file
don't extend array list
Posting: remove count
Terms: map string directly to posting list
add StopWordsFilter

only filter a, be, of, the, to
IndexerFactory: terms don't need statistics anymore
App: use StopWordsFilter