Add Mac OS bundle creation script
Sys: Look for game data in the bundle resources directory on Mac OS
configure: Fix EVAL_SHELL_VAR for values with whitespace
Check for ENABLE_NLS when determining whether to use gettext
Define the locale path in config.h instead of passing as a compiler argument
configure: Move define to config.h to fix compile error with --enable-debug
configure: Detect libenet more reliably
configure: Add --enable-dynamic-support-libs option for Windows