Add history support in command mode#31

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tcunha wants to merge 4 commits intoryanflannery:masterfrom

Commits on Feb 12, 2013

Add history support in command mode.
Tiago Cunha
committed
Use strdup(3) when saving the response.
Tiago Cunha
committed
Remove size limit on user entered strings.
Tiago Cunha
committed
Add shell commands to the history, as well.
Tiago Cunha
committed