Fix #15 [Breaking Change]: use same behavior of system glob

[thomasvargiu]

Fix #15: Fixed operator precedence comparing flags on Glob.

Breaking change: it should be released in a next major version.

This will fix the wrong condition when comparing flags, allowing the use of system glob function when GLOB_BRACE is available (right now it will always use the fallback).
This will also fix the fallback method to use the same behaviour of the system glob function.

The fix will cause a breaking change, changing the behavior.
Right now, when GLOB_BRACE is used in flags, the behaviour is almost the same of using GLOB_BRACE | GLOB_NOSORT flags. Fallback method is fixed to correctly sort results when GLOB_NOSORT is used.

I would suggest to add a E_USER_DEPRECATED error in the current release with a warning of the future change behaviour when using GLOB_BRACE without GLOB_NOSORT.

[thomasvargiu]

I noticed that the problem on different order depends on the used OS. On mac, files are not ordered alphabetically by default. BTW, the fix use the correct behaviour.