Use of taint mode makes cluster install tricky

[hardingnj]

Hi there, thanks for this neat tool.

Had a few issues with non root user install.

Usually I use the $PERL5LIB env var to append to @INC, this means I can install modules in my home directory rather than pestering a sys admin.

However, taint mode explicitly ignores all ENV variables making this not possible.

Is there a clear need for taint mode here?