#23 esiply isn't building on mac

[Richard Uhler]

A number of issues with flex and bison are keeping esiply from building on the mac, along with who knows how many other issues.

See Bugs 1795594, 1795581 for some more details.
bison was also complaining about the @$ stuff in src/parser.y.

[Richard Uhler]

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Upgrading the flex and bison versions helped, but now we have issues with stl. For some reason the stl header files aren't compiling. And mac seems to have ignored my carefully crafted case in the filenames, which is quite annoying.

[Richard Uhler]

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Now that we're using automake and autoconf, this might work. Try again.