simple implementation of UAX#29
StandardTokenizer: remove unused isDelimiter
StandardTokenizer: make isNumeric public
StandardTokenizer: move read above of nextChar
StandardTokenizer: implement isHebrew_Letter
StandardTokenizer: fix invalid index and add some tests
StandardTokenizerTest: add test for isNumber
StandardTokenizerTest: better test name
StandardTokenizerTest: add a test case
StandardTokenizer: implement position
StandardTokenizer: add Extend and Format
StandardTokenizer: move numeric test close to alphabet test
BiwordTokenFilter: fix end of stream cased exception
BiwordTokenFilterTest: better test case name
CharacterTokenizerTest: better test name
move Document and Field to com.mee.ir
DatabaseCollection: typed iterator
DatabaseCollection: writing to database should be synchronized
Searcher: simplify score sorting
add test for Posting and PostingList