Merge pull request #15 from chrox/master

fix uncaught DJVU::GException when initiating tesseract
Merge pull request #16 from chrox/master

add getPagePix method in pdf/djvu modules
add dependencies for LEPTONICALIB and TESSERACTLIB
wrap long lines
Merge pull request #17 from houqp/houqp-master

add dependencies for LEPTONICALIB and TESSERACTLIB
Add support for kobo devices by a define. Additionally, compiling with KOBO_PLATFORM defined should also give support for old Kindle Touch 5.0.x firmwares.
clean up whitespaces
add kobo target to makefile
Merge pull request #18 from giorgio130/master

Add Kobo devices support
fix a bug in patching popen_noshell.c
Merge pull request #19 from ddysher/master

Fix popen_noshell-buildfix.patch
add lightenRect to change background color of a rect