Merge pull request #28 from chrox/master

add USE_FIXED_POINT compile parameter for fast bmp resample in PDF reflow
Merge pull request #29 from chrox/master

add OCR language variable in koptcontext
Merge pull request #30 from chrox/master

add waveform_mode and update_region parameters in Screen refresh
Merge pull request #31 from chrox/master

fix update region
Kobo frontlight interface.
Merge pull request #32 from giorgio130/light_support

Kobo frontlight interface.
update crengine submodule url
update crengine
update kpvcrelib patch