- Addressed valgrind complaints by freeing allocations for commands and columns.
This leaves one complaint about getpwuid, which is either an optional free,
or not valid, depending on OS. (Thanks to Bryce Harrington).
- Broke out View into ViewTask and ViewText, where the former uses an
external std::vector <Task> as storage, thus eliminating the additional
copy, and the latter that duplicates data and color into 2D vectors
for rendering non-task data.