fail with tiny features.

Better autoconf check for uint32_t.

Use uint32_t to avoid crash on 64 bit machines.
Added error numbers for Blowfish errors.
Fixed the tiny version not building.

Problem:    Large file support is incorrect.
Solution:   Add AC_SYS_LARGEFILE to configure. (James Vega)

Problem:    Mac: Can't build with different Xcode developer tools directory.
Solution:   make "Developer" directory name configurable. (Rainer Muller)

Problem:    Build problems on Tandem NonStop.
Solution:   A few changes to #ifdefs (Joachim Schmitz)

Problem:    Ruby 1.9 is not supported.
Solution:   Add Ruby 1.9 support. (Msaki Suketa)