HISTORY
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Version 0.0.4
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* Switch urchin -x to urchin -sh and fix some problems with it
* Documentation

Version 0.0.3
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General tidying

Run with different shells in three ways

* urchin -s
* $TEST_SHELL variable with $TEST_SHELL
* $TEST_SHELL variable with urchin -sh

Set NULL_GLOB so zsh doesn't print a warning.

Before version 0.0.3
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We adjusted the input parameters so it is harder to accidentally run all executable files in you
r home directory.

We added directory-based indents.