Patch 0.5.9

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Features
With increasing Black Market level, taxes are reduced. Soldier Exchange also does not need to have been researched for purchasing. __NOWYSIWYG__
 * 1) New building: Black Market added
 * 2) The building has 25 levels and allows the sale of land and sea units for any resources.
 * 3) A requirement for the building is the new "Soldier Exchange" research and a building ground.
 * 4) The building levels unlock the unit types that can be sold, after one another.
 * 5) For every unit type there is a minimum and maximum price, to avoid overpricing or dumping prices.
 * 6) For every soldier exchange, one part of the sale price has to be deducted as tax.
 * 1) The offered troops can be viewed and accepted by other players in the new "Soldier Exchange" tab at their Trading posts.
 * 2) You can also purchase troops that you haven't researched yourself yet.
 * 3) No Black Market is required to buy troops.

Changes

 * 1) The trading post view has been adjusted slightly.
 * 2) Wonder re-balancing.
 * The effects of the Hades, Demeter, Athena, Ares and the Colossus miracles have been strengthened.
 * Details for Wonder re-balancing (added in a separate posting):

Notes:
 * New things are marked in red.
 * Tscatter = additional scatter time.
 * All effects stay the same.__NOWYSIWYG__

Bugfixes
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 * 1) When entering a running battle, only the units in the battle overview that fought from entry are displayed.
 * 2) When the chat was opened the bread crumb list was not click-able.
 * 3) In some cases accepting a garrison rights agreement lead to scattering of the stationed allies.
 * Allied stationed troops are not thrown out of the town anymore when the town owner comes to a garrison right agreement.
 * 1) The tooltip in the academy always displayed Technocracy regardless of the actual government form.
 * 2) There were cases in which a colony could not be abandoned due to several actions done by other players.
 * 3) The image of the pirate seen when converting caper points to crew strength was too high.
 * 4) In the overview of the battle reports a wall with 7 elements was displayed regardless of the actual amount.
 * In the battle reports, the maximum amount of walls was displayed instead of the actual amount.
 * 1) When purchasing goods at an own town, the loading time was incorrectly calculated.
 * When buying in your own market the time that would be necessary to get there was added to the loading time.
 * 1) When accepting a trade offer, the loading time was not displayed.
 * 2) Military actions of an occupier do not prevent the deletion of an occupied town by the owner.
 * 3) The list for espionage reports was too wide in some cases.
 * 4) When using wonders and clicking on "max", a wrong value for maximum donate-able amount was entered.
 * 5) In battle reports the unit (losses) of rounds were shown that you didn't take part in yourself.
 * 6) Various display errors fixed.