Merge pull request #228 from chrox/master

update k2pdfopt to version 1.66
Remove ffi.cdef to avoid conflict with ffi/util.lua from koreader-base
Merge pull request #229 from thotypous/lulip-ffi-util

Remove ffi.cdef to avoid conflict with ffi/util.lua from koreader-base
Update koreader-base
Use ffi/lulip.lua from koreader-base; change package.path
Merge pull request #230 from thotypous/lulip-move-base

Move lulip to koreader-base
No need for lulip to be global
Update koreader-base
Merge branch 'master' into lulip-move-base
Merge pull request #231 from thotypous/lulip-move-base

No need for lulip to be global
patch crengine to register external fonts