Unless you intend to buy large swathes of land, there have been no changes which would affect your buying property in Turkey. There was a temporary suspension of sales to foreigners last year while the question of such sales was resolved. Buying property here is quite safe if done through a reputable Turkish lawyer and I would strongly urge any potential buyer not to trust anyone who says otherwise; not all builders and estate agents are honest.
Foreigners owning properties in Turkey with a legitimate TAPU (title deed) have absolute ownership with all the rights they would have owning property in UK.
It would be impossible for a foreigner to buy a property (with Tapu) in a designated military zone and no, as far as I know, there are no such areas in the Kalkan area affecting any propertes available to foreigners.
The rules with regard to foreigners buying property in rural areas are fairly clear; generally it is not allowed and buying a company to ''legalise'' such a purchase is a very dodgy exploitation of a ''loophole'' unless, of course, your active company will bring investment to the area and employ local labour. I think that some owners who have dormant companies for this purpose could be in for a shock as the land registry becomes more computerised.