0.9 () -

- TS-1 Apostrophe inside tasksh 'log' causes segmentation fault (thanks to
       David Stahl).
- TS-2 tasksh segfaults if quotes not closed (thanks to Fidel Mato).
- TS-5 tasksh segfaults (thanks to David Patrick).
- TS-13 Quotes included when using task shell (thanks to Kevin Gunn).
- libreadline support added for line editing and command history.

Project started 2014-06-08

------ start -----------------------------------