Memory leaks

[crcox]

valgrid --leak-check=full ./Lens will reveal many. Need to add/register ExitProcs.

[crcox]

It turns out that these are generally unproblematic. Most originate from functions in the Tcl/Tk libraries. The ones that don't either are recoverable by the OS, or are trivial. They should still be handled, but they are not a barrier to use.

Valgrind summary:

==6171==    definitely lost: 111 bytes in 3 blocks
==6171==    indirectly lost: 0 bytes in 0 blocks
==6171==      possibly lost: 1,928,208 bytes in 52 blocks
==6171==    still reachable: 373,958 bytes in 1,388 blocks
==6171==         suppressed: 0 bytes in 0 blocks

[crcox]

I'd like to know more before actually closing this. Another set of eyes on the issue would be invaluable.