Updating xcode project file to newer version of Xcode.
Removing doxygen file.
Updating license to modified BSD license.
Adding utility for determining system byte order.
Removing deleted file from Xcode project.
Changing file order in Xcode project.
Merge branch 'ds/endian' into pu

* ds/endian:
  Adding utility for determining system byte order.
Specifing file types in Xcode project.
Updating formatting of verbose output.
Updating comment style in posixregex.
Updating posixregex example in source comments.
Adding checks to posixregex for incompatible options.
Updating how result of regexec() is checked.
Adding comment.
Changing variable name.
Updating comments.
Moving variables of configurable options to struct
Adding ability to only display substring matches.
Adding ability to toggle case sensitivity.
Adding ability to toggle "basic" regular expressions.