Updated autotools files
Added large file support
Fixed a warning thrown when compiling on the Mac

- now that the project is built with the -Werror flag all warnings are
  converted to errors
- had to modify a patch that was applied to make the code build on Irix
Updated version of hexcurse from 1.55 to 1.58 in the configure scripts
Updated change log and README references to the newest (1.58) version