Rename run input parameter into run_num, see DBS ticket 4247
round ts for DBS records
Convert block to block_name for composed queries, e.g. look-up of file,run,lumis via dataset/block. This is more clear since it align api argument with DBS3 naming conventions
Unquote block name when extract it from args url
Replace dict.has_key(key) with key in dict to be compatible with new python syntax
Merge branch 'dbs3'

It contains dbs3 changes: run -> run_num conversion, usage of block_name, etc.