add jenkins auto-test script.
add Example input for jenkins,written in yaml
add try catch to the subtask of CSVReader/Writer
SimpleTextWriter is added. CSVWriter, StringHelperImple are modified.
Merge branch 'develop' of github.com:scalegraph/scalegraph into develop2

Conflicts:
	src/org/scalegraph/io/impl/CSVWriter.x10
Merge branch 'feature/spectralclustering' into HEAD
Merge branch 'develop' of github.com:scalegraph/scalegraph into develop2
resume try catch
add build test
Merge branch 'develop' into feature/jenkinsScripts
add TestTransToCSV
add sed script
fix a bug on CSVReader
add method to retrieve source and target edge list from Graph object
add StopWatch
fix a bug on CSV read header method
some fixes
fix run_test method
Merge branch 'develop' into feature/jenkinsScripts
Merge branch 'feature/jenkinsScripts' into develop