Add xml_tree property to lxml extension
Add xml_tree property to lxml extension

shaunstanislaus/grab,istinspring/grab,pombredanne/grab-1,kevinlondon/grab,shaunstanislaus/grab,subeax/grab,lorien/grab,DDShadoww/grab,lorien/grab,liorvh/grab,raybuhr/grab,alihalabyah/grab,kevinlondon/grab,SpaceAppsXploration/grab,huiyi1990/grab,maurobaraldi/grab,subeax/grab,giserh/grab,giserh/grab,huiyi1990/grab,codevlabs/grab,DDShadoww/grab,raybuhr/grab,maurobaraldi/grab,subeax/grab,istinspring/grab,liorvh/grab,codevlabs/grab,alihalabyah/grab,pombredanne/grab-1,SpaceAppsXploration/grab