Initial Norwegian Bokmål translation
Correctly reclaim std::vector unused memory.

Add new utility function to do that.
std::vector::resize() is not guaranteed reclaim unused memory.
Usually it will just change size, leaving same capacity.
To do that correctly we copy elements to temporary vector,
and afterwards swap it with ours. (Thanks Meyers :-)

Because this operation is expensive, don't do it in for each mod.
It should be performed afterwards.

Also, stop manully driving vector allocation size, since it is what
any sane standard library would do for you.
Add assert.
Merge pull request #304 from hansjoachim/norwegian-translation

Initial Norwegian Bokmål translation
Merge pull request #135 from Gallaecio/master

Minor changes in the Galician translation
[Galician Translation] dende → desde
Fix comparison sign mismatch warning.
Merge pull request #305 from piotrrak/vector-cleanup

Vector usage cleanup in ItemManager
Merge pull request #306 from Gallaecio/master

[Galician Translation] dende → desde
Merge pull request #136 from Gallaecio/master

[Galician Translation] ouro → moedas
Linear search is not required here.
Add some utility functions, and use them.

clamp*() functions, percentChance() and randBetween().
Allow menus to be opened after death

The menus are still close when the player dies, so they can see the hudlog
message explaining the game over status.

Stat upgrade buttons are now disabled when dead.
Tab behavior in MenuLog is now similar to MenuPowers.
remove statement with no effect.
replace structs by classes.
Continuous Integration (travis): check compiling with old compiler.

Compiler version as of debian stable.
Continous Integration (travis): remove different versions of gcc.

They don't work.
Fix enemy groups in Lost Mines

The `number` key requires 2 values now, a min and a max. For each group, I
made the min and the max the same, which I think should mimic the old
behavior. As far as I know, this is the only map that was broken this way.
correct CMake flags for no build type specified.
pack female leather hood, add minicore and noalpha version.