use ASCII encoding for password envars
remove two more uses of default encoding
Fix #617, make chart axis labels appear
Merge pull request #624 from twosigma/alee/fix-617

Fix #617, make chart axis labels appear
remove more uses of default charset
Revert "Handle moving markdown editor up and down"

This reverts commit 487d6bbbe5778f135accd6f68d6ec79465ef561d.

causes console errors and breaks ipynb import.
Merge pull request #626 from twosigma/spot/621

Fix Issue #621
Show runtime in output cell

fixes #520
Standardize help menu

fixes #551