Merge pull request #291 from Gallaecio/master

Updated the Galician (gl) translation. Also fixed a build issue and some English strings.
Added support to know whether a battle is a boss battle.

And set this on a forgotten battle.

This will later be useful when adding special objects or general scripts
that shouldn't work in boss battles.
Scripted and added four new items.
Updated enemies dropped items to have more variety
Fixed an icon filename.
Added two missing hidden items in the Mountain Shrine.
Fixed the battle item list scrolling view

Previously, it could be confusing as the scrolling offset was left to its previously used value, hence sometimes not showing the actual item selected.
Tweaked a bit the rate of certain dropped items.

They were a bit high before that.
Forgot to rnd the flame animation in shrine entrance
Added a few missing walls to the 1st floor NW map.
Scripted the 1st floor NW map the most possible.

It is now ready to open path for other maps.
Updated a bit the 1st floor SW map.
Scripted most of the 1st floor SW map.
Added support to the latest added trigger in 1st floor NW map.

Also reduced a bit the aggressiveness range of the enemy there to make it behave better.
Scripted most of the 1st floor SE map.

We're now close having the 1st floor completely scripted. :)
Fixed a typo.
Kept scripting the dungeon.
Fixed the Yeti battle sprite.
Fixed a dumb typo in the 1st floor NW map.
Added stone fence map objects and used them where necessary.