Modify the log levels of LocalDuplicatedRemovedScheduler.java
The old version will print a debug level log each time the push method is
called. So sometimes, when a html page have multiple links for the same
page, the debug log will appears more than once. Also, when we meet a
duplicate URL, it will also print a log, which will be confusing.
I change the level of it to trace. And each time a URL is really push into
queue, print a debug level log.
Merge pull request #84 from ccliangbo/logInScheduler

Modify the log levels of LocalDuplicatedRemovedScheduler.java
[doc]
Merge branch 'master' of github.com:code4craft/webmagic
change logger to slf4j style for performance #84
[BugFix]multi model in one pageprocessor will be skipped #85
[BugFix]exclude log4j.xml from maven jar plugin #82
Merge pull request #86 from sebastian1118/master

new feature: PatternProcessor
change the formatter of log.
To use slf4j, we should insert {} into the formatter string.
Merge pull request #89 from ccliangbo/slf4jFormat

change the formatter of log.
add SubPageProcessor #86