Remove -dynamiclib flag

Introduced in #37 as a cosmetic improvement for some specific systems, the dynamiclib flag results in the following error on Mac OS 10.9.2:

    clang: error: invalid argument '-bundle' not allowed with '-dynamiclib'

Removing it resolves the error.
Merge pull request #51 from theopolisme/master

Remove -dynamiclib flag. May need some OSX version specific inclusion if older versions of OSX continue to complain.