bugfix: remove deprecated dependency on stl2pov
bugfix: pointing at wrong file
rename stl.coffee to stljs.coffee and pause stream in file2PNG
replace non-word characters with _ in modelName
bugfix: format of returned parse is different
change file2PNG to use filePath
bugfix: the fileName for test is wrong
change to use stljs in specs
bugfix: povray conversion can't have trailing comma