* Added append-mode to #capture: use #capture >file-name
* Cleaned #spawned commands interface: text they print on
standard output *MUST* terminate with a newline ('\n')
in order for powwow to execute it.
* Fixed missing #include <time.h> in main.h.
* Fixed broken matching of #mark patterns starting with $
* Added the following user-contributed patches:
* Put also 1-char lines into history;
* Do not capture/movie data coming from spawned commands;
* Fixed a bug in command parser.
