Multi-line layout.

* The Shape tool gives a height to the glyphs shaped from
  new paragraph characters.
* An extra line with no characters but height is created
  if the last characters is a new paragraph.
* Bug fixed in the Shape tool when there are new
  paragraph characters. Was not spliting the text in
  chunks correctly.
* Bug fixed in the multi-language processor. Was not
  splitting the text in chunks correctly when there are
  characters common for all scripts mixed in other scripts.
* Bug fixed in the bidirectional support modul.
  Mirror only the text of the right to left paragraphs.

Change-Id: Ie1321131336b2ffa883db9d3f5873528c1f26aaf
Signed-off-by: Victor Cebollada <v.cebollada@samsung.com>