Merge pull request #1 from istudens/master

reverting back to Chao's bugzilla interface
Fix some FIXMEs:
- Some pull request closed without change state to 'merged'.Therefore, checking state equals 'closed'.
- Allow pull request relates to multi upstream pull request or bugzilla issue.
- Use .equals() to check flag status.
Add the getBug() functionality in class Bugizlla
Merge pull request #3 from soul2zimate/master

Fix some FIXMEs
Merge pull request #4 from soul2zimate/master

Add the getBug() functionality in class Bugizlla
Make Bug and Flag serializable, methods checkBugzillaId() checkUpStreamPullRequestId() non static
Merge pull request #5 from soul2zimate/master

Make Bug and Flag serializable, methods checkBugzillaId() checkUpStreamPullRequestId() non static