Merge pull request #152 from Knitter/master

Started work on portuguese translation
Included the pt_PT files in the game. You can now play in Portuguese. :)
BUILD: fix building with libpng-1.6
CMAKE: make paths modifiable

also make sure no relative paths get passed to the preprocessor flags
Merge pull request #154 from hasufell/master

fix libpng-1.6 compilation and make paths modifiable
Added a missing chair sprite in Bronann's house.
Added a particle effect version of defensive stance triggered for high sprites.

This fixes the look of defensive stance casts on Banesore.
Misc tweaks on the riverbank at night scene.

- Added another dialogue to Banesore
- Tweaked the smoke script
- Made the soldiers around Kalya wonder where she is.
Fix placement of emotes.

The code was breaking the x alignment.

I also cleaned up a bit the code style in MapSprite::Draw()
Added people I felt missing in the credits.
Added the first scene after the fight.

(Still one before the save point.)
Added the smoke trigger missing sound
Added sounds to the defense, fire and wave spells.
Fixed cave 1-2 -> cave 1-1 transition.
Removed useless reference in the pathway at night script.
Simply changed the name of the Mount for something we agree about.
Added some necessary tiles in the harrvah interior tileset.
Added a missing check upon the usability of an item within the menu mode.

This fixes later items that can't be used directly.
Don't show dialogue bubbles when not in map exploration mode.

I also simplified the function code a bit.
Added two new items that will be later be quite useful... ;)