Add facility to write the HTML option page using java. Still to be tested. Javadoc yet to be managed
GIRAPH-673: Input superstep should support aggregators like any
other superstep (Bingjing via aching)
add the description filed in the configuration object
complete the summary generation from java
add all the javadoc in the configuration options and change the file name of the options list page
fix the size of the table
GIRAPH-683: Jython for Computation (nitay)
removed the python version which is not needed anymore
Merge remote-tracking branch 'upstream/trunk' into GIRAPH-623
fix the patch to keep only a single constructor.
GIRAPH-694 Setting configuration in GiraphConfiguration causes
non thread safe copies (aching)
Merge remote-tracking branch 'upstream/trunk' into GIRAPH-623

Conflicts:
	giraph-core/src/main/java/org/apache/giraph/conf/AbstractConfOption.java
	giraph-core/src/main/java/org/apache/giraph/conf/GiraphConstants.java
add the description-enriched options for Jython
add the generated options page
fix option based on the new API
GIRAPH-623: Website Documentation: table of parameters
GIRAPH-695: Add getCombiner and getComputation methods for
MasterCompute (aching)
Merge remote-tracking branch 'upstream/trunk' into GIRAPH-623
remove the options.xml file since now is easy to generate it
GIRAPH-696: Should be able to spill giraph metrics to a specified directory on HDFS