Fix "conditional expression between distinct pointer types 'gzFile_s*'
and 'FILE*' lacks a cast" error messages with FreeBSD 9.1.
Use "-pedantic -Wno-long-long" instead of "-ansi" to enable support
for data type long long on g++ versions where -ansi doesn't imply
C++11 (likely all current versions?). Fixes error message
"Options.cpp:204: error: 'strtoull' was not declared in this scope"
on FreeBSD 9.1.