add new functions that to parse the xml and get all the infomations then save into database ,also change the PubmedFileParser for hadoop 
Signed-off-by:jasstion <zhaoyufei@edanzgroup.com>
add new functions that can parse xml to json
Signed-off-by:jasstion <zhaoyufei@edanzgroup.com>
add new dependency for json utils
Signed-off-by:jasstion <zhaoyufei@edanzgroup.com>
update SpringerDataFetcher program to save them into mongo database, also add new customer inputFormats and RecordReader for parse Pubmed files
Signed-off-by:jasstion <zhaoyufei@edanzgroup.com>