Enhanced EditEngine to be able to hold more than 64k paragraphs. Used
also in RTF import Calc and Writer, so that could benefit as well.

* changed all EditEngine,Outliner,... related paragraph index/count
  variables from sal_uInt16 to sal_Int32
  * sal_Int32 instead of sal_uInt32 to match accessibility API
  * matched some Outliner methods' paragraph parameters from sal_uLong
    to sal_Int32
  * containers capable to hold size_t nevertheless are limited to a
    maximum of sal_Int32
* changed definition of EE_PARA_NOT_FOUND and EE_PARA_ALL to
  SAL_MAX_INT32
+ added EE_PARA_MAX_COUNT and EE_TEXTPOS_MAX_COUNT to initialize
  ESelection with what previously were hard coded 0xFFFF all over the
  place
+ for similar reason added EE_TEXTPOS_ALL corresponding to EE_PARA_ALL
  to initialize an ESelection spanning all available text like
  aSel(0,0,EE_PARA_ALL,EE_TEXTPOS_ALL)

Change-Id: I62d1b9c399cd709a4f93dbac31b219a61c46ec00
Reviewed-on: https://gerrit.libreoffice.org/3838Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>