* utils.decode_text: fix "TypeError: ord() expected string of length 1, but int found"
fixes https://github.com/goulu/pdfminer/issues/24
* pdfinterp.execute: don't assume that every keyword name can be decoded as utf-8
fixes "'str' does not support the buffer interface", https://github.com/goulu/pdfminer/issues/23
* default settings.STRICT to False, for compatibility with the original pdfminer
* PDFCIDFont: handle font registry/orderings that may be PDFObjRefs
* utils.nunpack: handle 8-byte integers