0.3.0

Use tpool instead of a manually managed thread pool.

0.2.0

• Incompatible change - Use tcllib's cmdline for command line handling; see the README for the new arguments syntax
• Split code into separate files, amalgamate with Make
• Implement smarter threading: reuse idle threads, kill ancient ones
• Don't leak interp's

0.1.0: Allow to specify the path to the tcl.scgi script

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