HBASE-11516 Track time spent in executing coprocessors in each region (Srikanth Srungarapu and Andrew Purtell)
HBASE-11594 Unhandled NoNodeException in distributed log replay mode (Jeffrey Zhong)
HBASE-11583 Refactoring out the configuration changes for enabling VisibilityLabels in the unit tests (Srikanth Srungarapu)
HBASE-11640 Add syntax highlighting support to HBase Ref Guide programlistings (Misty Stanley-Jones)
HBASE-11630 Refactor TestAdmin to use Admin interface instead of HBaseAdmin (Carter Page)
HBASE-11648 Typo of config: hbase.hstore.compaction.ratio in book.xml (Liu Shaohui)
HBASE-3270 When we create the .version file, we should create it in a tmp location and then move it into place
HBASE-4744 enable test that log roll fails after split start.

Note that this changes testLogRollAfterSplitStart from a Large
test to a Medium test.

FSHLog changes:
* make logging in replaceWriter handle null newPath
* clean up javadoc for replaceWriter

TestHLogSplit changes:

* removed testLogRollAfterSplitStart

TestLogRollAbort

* added testLogRollAfterSplitStart
* remove @Ignore, add debug messages about test progress
* clean up check for proper failure from log roll
HBASE-11620 Record the class name of Writer in WAL header so that only proper Reader can open the WAL file (Ted Yu)