updated INSTALL.txt to reflect current install procedures
updated INSTALL.txt to reflect current install procedures

FredHutch/Oncoscape,FredHutch/Oncoscape,oncoscape/Oncoscape,LisaMc/Oncoscape,LisaMc/Oncoscape,FredHutch/Oncoscape,oncoscape/Oncoscape,LisaMc/Oncoscape,LisaMc/Oncoscape,oncoscape/Oncoscape,LisaMc/Oncoscape,FredHutch/Oncoscape,oncoscape/Oncoscape,FredHutch/Oncoscape,oncoscape/Oncoscape