database: renamed mapping.texy to type-conversion.texy

The page contains documentation of automatic type conversion (date,
boolean, numeric), not entity mapping. Renaming clarifies the purpose
and frees the `mapping` URL for upcoming entity mapping documentation.

Author: dg

database/bg/@left-menu.texy

@@ -6,7 +6,7 @@ Nette Database
 - [Трансакции |transactions]
 - [Изключения |exceptions]
 - [Рефлексия |reflection]
-- [Мапинг |mapping]
+- [Мапинг |type-conversion]
 - [Конфигурация |configuration]
 - [Рискове за сигурността |security]
 - [Надграждане |en:upgrading]

database/bg/mapping.texy database/bg/type-conversion.texydatabase/bg/mapping.texy renamed to database/bg/type-conversion.texy

@@ -6,7 +6,7 @@ Nette Database
 - [Transakce |transactions]
 - [Výjimky |exceptions]
 - [Reflexe |reflection]
-- [Mapování |mapping]
+- [Konverze typů |type-conversion]
 - [Konfigurace |configuration]
 - [Bezpečnostní rizika |security]
 - [Upgrade |upgrading]

database/cs/@left-menu.texy

@@ -6,7 +6,7 @@ Nette Database
 - [Transaktionen |transactions]
 - [Ausnahmen |exceptions]
 - [Reflexion |reflection]
-- [Mapping |mapping]
+- [Mapping |type-conversion]
 - [Konfiguration |configuration]
 - [Sicherheitsrisiken |security]
 - [Upgrade |en:upgrading]

database/cs/mapping.texy database/cs/type-conversion.texydatabase/cs/mapping.texy renamed to database/cs/type-conversion.texy

@@ -6,7 +6,7 @@ Nette Database
 - [Συναλλαγές |transactions]
 - [Εξαιρέσεις |exceptions]
 - [Reflection |reflection]
-- [Αντιστοίχιση |mapping]
+- [Αντιστοίχιση |type-conversion]
 - [Διαμόρφωση |configuration]
 - [Κίνδυνοι ασφαλείας |security]
 - [Αναβάθμιση |en:upgrading]

database/de/@left-menu.texy

@@ -6,7 +6,7 @@ Nette Database
 - [Transactions]
 - [Exceptions]
 - [Reflection]
-- [Mapping]
+- [Type Conversion |type-conversion]
 - [Configuration]
 - [Security Risks |security]
 - [Upgrading]