Add safety picture using in some classes.
temporary fix for locale dependent json formatting
Merge branch 'master' of https://github.com/gecube/opencaesar3
GameDate in own class now.
ComputerCity now create one merchant in 3 month.
City merchant logic improved. renamed Propagator::ReachedBuldings -> Propagator::Ways.
EmpireMap save offset in AppConfig. CityMerchant now may sell/buy goods in warehouse. Merchant Warehouse finding alg improved.
Merge branch 'fix/json-locale-dependent' of https://github.com/nickers/opencaesar3
CityMerchant logic improved. Now sell/buy goods.
Fixed ansi to float converting.
Trading improved. Merchant use city import/export orders.
mingw fix add. zip archive reader add, prepare for exclude dependence from libarchive and use direct work with zlib.
Gcc fix(Issue #5)
Remove dependence from libarchive. Use native zlib for work with pics*.zip. Improved VFS for mount archives such folder. Refactoring picture manager, now load only needed picture runtime. add mingw 4.8 support.
Merge pull request #188 from dalerank/master

mingw 4.8 support. new picture manager. VFS upgrade.