update README with conda install instructions
update README with conda install instructions

jmcq89/megaman,jakevdp/megaman,mmp2/megaman,jmcq89/megaman,jmcq89/megaman,jmcq89/megaman,jakevdp/Mmani,jakevdp/Mmani,jakevdp/Mmani,jakevdp/Mmani,mmp2/megaman,jakevdp/megaman,mmp2/megaman,mmp2/megaman,jakevdp/megaman,jakevdp/megaman