bump version number to 0.4.5
bump version number to 0.4.5

pombredanne/xmltodict,butson/xmltodict,haiyangd/xmltodict,CyberTailor/iBlock,martinblech/xmltodict,pombredanne/xmltodict,solvebio/xmltodict,sporgj/xmltodict,martinblech/xmltodict,bzamecnik/xmltodict,ahlusar1989/xmltodict,lucius-feng/xmltodict,CyberTailor/iBlock