- fixed errors in width calculation or nested headers (the nested width calc is still duplicated, which irks me, but alas; see the almost-duplicate code in applyColumnHeaderWidths())
- fixed errors in width calculation or nested headers (the nested width calc is still duplicated, which irks me, but alas; see the almost-duplicate code in applyColumnHeaderWidths())

- some work related to the previous commit where everyone is brought in-line regarding the new info chunks being passed around to formatters and editors.

- some JSHint and JSCS appreciation

- a typo fix in a comment

GerHobbelt/SlickGrid,GerHobbelt/SlickGrid,GerHobbelt/SlickGrid