Merge pull request #44 from chrox/master

integrate build configuration patch into libk2pdfopt
remove now superfluous libk2pdfopt.patch
Merge pull request #45 from hwhw/master

remove now superfluous libk2pdfopt.patch
float-abi adaptations for Kobo
Merge pull request #47 from thotypous/master

float-abi adaptations for Kobo
bugfix: build static libjpeg into libkoreader-cre
Version 62 of jpeg library from the upstream crengine is used
instead of newer libjpeg shipped with mupdf.
This patch fixes bug #224.