Added an option to include/exclude comments of new bug report.

README.md updated for BLIA v1.5

Warning message related unnecessary import removed.

candidateLimitRate, candidateLimitSize added to reduce anlaysis

computing time
Evaluator's thread error of synchronization fixed

Bug.bugID datatype changed from String to int

1. File path handling logic added to include test sources

2. Improved stack trace analysis logic to support file path 
3. Same fixed date handling logic added for computing similarity score
among bug reports
4. DB schema updated(SF_INFO.CLS_NAME added.
BUG_INFO.IDX_BUG_INFO_FDATE)

1. HTML tag removement logic added to BugCorpusCreator

2. HTML special character replacement logic added to FileParser
3. "word's" parsing logic added to Spllitter
4. Stemming test codes added.

Database creation policy changed.(One DB for all projects to one DB for

one project)

MAP implemented. The result is exactly same with BugLocator.

All DB modules were linked to BugLocator and implemented/tested.