use libplutil for log and read fb path from config file

* remove log.h and use common plsdk/log.h instead
* use plsdk/plconfig.h from libplutil
* get frame buffer path from configuration file if
  none provided by caller

Signed-off-by: Guillaume Tucker <guillaume.tucker@plasticlogic.com>
read rotation and cfa options from configuration file

Signed-off-by: Guillaume Tucker <guillaume.tucker@plasticlogic.com>
read crop area coordinates from configuration file

These coordinates are relative to each edge of the display.

Signed-off-by: Guillaume Tucker <guillaume.tucker@plasticlogic.com>
read font name and size from config file

Signed-off-by: Guillaume Tucker <guillaume.tucker@plasticlogic.com>
Android.mk: add include path to libplutil
rename configuration keys for consistency

Rename the font_* and crop_* configuration keys with a hyphen
instead of underscode for consistency in the naming style.
add optional config file path to pldraw_init

Signed-off-by: Guillaume Tucker <guillaume.tucker@plasticlogic.com>
update CFA settings in single function + sync with plep

* add update_cfa_settings function to update the settings that
  depend on the CFA configuration - this is used both in _init
  (using value from configuration file) and _set_cfa

* call plep_set_rotation and plep_set_scale in pldraw_set_plep to
  automatically synchronise these settings when a plep instance
  gets associated with a pldraw instance

* add asserts in pldraw_set_cfa to check the CFA identifier is
  valid (using _PLDRAW_CFA_N_)
Android.mk: fix include path to libplutil
ChangeLog v1.8 -> v1.9