add csv support
add csv support

csv file format is as follows(1st line is column names)
------------------------
name,isNew,description,quadrant,ring
aName,False,aDescription,aQuad,adopt
bName,False,bDescription,bQuad,trial
cName,False,cDescription,cQuad,assess
dName,False,dDescription,dQuad,hold

thoughtworks/build-your-own-radar,thoughtworks/build-your-own-radar,thoughtworks/build-your-own-radar