converted portal.md to asciidoc format as an experiment
converted portal.md to asciidoc format as an experiment

Change-Id: I5768c8d277273e4a8074602406197daa99c93408

8l/connectal,cambridgehackers/connectal,csail-csg/connectal,8l/connectal,hanw/connectal,csail-csg/connectal,cambridgehackers/connectal,8l/connectal,hanw/connectal,chenm001/connectal,hanw/connectal,8l/connectal,8l/connectal,hanw/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,cambridgehackers/connectal,chenm001/connectal,chenm001/connectal,hanw/connectal,cambridgehackers/connectal,cambridgehackers/connectal