Merge pull request #867 from stefanbeller/master

Regenerate language files
Updated Norwegian Bokmål translation based on the regenerated translation template
Merge pull request #870 from hansjoachim/norwegian

Updated Norwegian Bokmål translation based on the regenerated translatio...
Update Russian translation
Move effect definitions to powers/effects.txt

Effects are now always referenced via their name (previously "tag"),
just like it's done for item bonuses.
Merge pull request #871 from dorkster/effects_refactor

Move effect definitions to powers/effects.txt
Allow setting MENUS_PAUSE via config file

In addition, always pause when the exit menu is visible, regardless of
MENUS_PAUSE's value.
Merge pull request #872 from dorkster/pause_fix

Allow setting MENUS_PAUSE via config file
Display currency count in MenuStash

Just like in MenuInventory.
Merge pull request #873 from dorkster/stash_gold

Display currency count in MenuStash
*Improve menus/powers.txt parsing
*Add vector of power upgrades
*Draw upgrade button if upgrades are present
Use const references
*move upgrade buttons out from power_cells.
*stub nextLevel() and upgradePower() functions.
*Implement power upgrades
*ActionBar is not updated yet on power upgrade
Update engine.be.po

Translated new strings
Load power upgrades from savegame
Greek translation update for engine.el.po
Merge pull request #875 from mikhailSaTuRn/patch-1

Update engine.be.po
Update Ukrainian translation
Fix nextLevel search