v0.4.0 final release

. #57: time synchronization
. #96: Creating Web UI facility for generating different workload configuration files
. #155: Add support for "acceptable failure rate, failure %" to all stages
. #4: xml validator
. #77: contextual parameter list
. #167: storage policy supporting for openstack swift
. #37: support CDMI interface
. #139: NullPointerException when a mission is aborted
. #166: show driver alive state on controller index page
. #158: Extend "histogram" selector to support "open ranges"
. #165: enable Open range for object size in uniform and histogram
. #136: 1 GB Object Reads Fail due to IllegalArgumentException
. #99 (#152): measure and report the time for first and last byte in or out
. #159: Extend "histogram" selector to support "floating point" weights/percentages
. #143: at loading archived workloads, even there are 100 workloads, the UI shows only 98.
. #140: duplicated workload id generated
. #151: avoid being challenged for each request
. #137: when there are large # of archive jobs, exception will raise from archive list on web portal.
. #139: NullPointerException when a mission is aborted
. support http BASIC and DIGEST authentication
. add cdmi base and util bundle
. add cdmi adapter for swift+cdmi middleware