Merge PR #283 (max city height) into jgrpp

src/lang/english.txt

@@ -1918,6 +1918,8 @@ STR_CONFIG_SETTING_TOWN_CARGO_FACTOR                            :Town cargo gene
 STR_CONFIG_SETTING_TOWN_CARGO_FACTOR_HELPTEXT                   :Passenger, mail, and other town cargo production is scaled by approximately 2^factor (exponential)
 STR_CONFIG_SETTING_INDUSTRY_CARGO_FACTOR                        :Industry cargo generation factor (less < 0 < more): {STRING2}
 STR_CONFIG_SETTING_INDUSTRY_CARGO_FACTOR_HELPTEXT               :Primary industry cargo production is scaled by approximately 2^factor (exponential). This excludes tree-cutting industries.{}This is not guaranteed to be fully compatible with all industry NewGRFs.
+STR_CONFIG_SETTING_TOWN_ABOVE_HEIGHT                            :No towns above height level: {STRING2}
+STR_CONFIG_SETTING_TOWN_ABOVE_HEIGHT_HELPTEXT                   :No towns above the specified height level are built during map creation.
 
 STR_CONFIG_SETTING_EXTRA_TREE_PLACEMENT                         :In game placement of trees: {STRING2}
 STR_CONFIG_SETTING_EXTRA_TREE_PLACEMENT_HELPTEXT                :Control random appearance of trees during the game. This might affect industries which rely on tree growth, for example lumber mills