allow user to specify default address/worksheet for new session
reset display mode on markup to prevent long-range dependencies; add more fields to the default table schema
fix bug in string_to_tokens in handling of quotes
reset schema and display directives after each block (systematically); print out better error message
use stdbuf to turn off buffering for LocalMachine
source .bashrc explicitly so that the path is set properly
Merge pull request #20 from codalab/pliang

reset display mode / schema in worksheets, fix quote parsing bug