Merge pull request #8 from DbUp/issue/5_documentation

Fixed documentation to describe the quirk regarding schemaversions

Author: droyad

README.md

@@ -4,7 +4,8 @@
 [![Prerelease](https://img.shields.io/nuget/vpre/dbup-firebird?color=orange&label=prerelease)](https://www.nuget.org/packages/dbup-firebird)
 
 # DbUp Firebird support
-DbUp is a .NET library that helps you to deploy changes to SQL Server databases. It tracks which SQL scripts have been run already, and runs the change scripts that are needed to get your database up to date.
+DbUp is a .NET library that helps you to deploy changes to relational databases. It tracks which SQL scripts have been run already, and runs the change scripts that are needed to get your database up to date.
+This Provider is for deploying to Firebird databases.
 
 ## Getting Help
 To learn more about DbUp check out the [documentation](https://dbup.readthedocs.io/en/latest/)
@@ -13,4 +14,24 @@ Please only log issue related to Firebird support in this repo. For cross cuttin
 
 # Contributing
 
-See the [readme in our main repo](https://github.com/DbUp/DbUp/blob/master/README.md) for how to get started and contribute.
+See the [readme in our main repo](https://github.com/DbUp/DbUp/blob/master/README.md) for how to get started and contribute.
+
+# Quirks concerning the Firebird implementation
+
+The Journal Table for Firebird is called `"schemaversions"` i.e. with quotes. This can be confusing since other providers do not use quotes.
+
+It will not be fixed because of backwards compatibility. You can check the content of the table by using
+
+```sql
+select * from "schemaversions"
+```
+
+In a new project you can also choose another name for the JournalTable instead like this:
+
+```csharp
+    public static UpgradeEngineBuilder JournalToFirebirdTable(this UpgradeEngineBuilder builder)
+    {
+        builder.Configure(c => c.Journal = new FirebirdTableJournal(() => c.ConnectionManager, () => c.Log, "ABetterTableName"));
+        return builder;
+
+```