[Firebird-net-provider] [firebird-support] Clarify / Document Install Procedure

[Clyde E. <ct...@gm...>]

After most things work, I decided to start with a new program /
project ... over time, the memory fades.

Here is the procedure I used:

To install Firebird: Visual Studio 2013 -> File -> New -> Project,
etc. ---------- then Tools -> Library Package Manager -> Manage NuGet
Packages -> search "firebird" -> Firebird ADO.NET Data provider ->
Install (button).

Resulted in 1) References -> FirebirdSql.Data.FirebirdClient, and 2)
FirebirdSql.Data.FirebirdClient.5.8.0 subdir ... with Firebird .dll's.

Then added "using FirebirdSql.Data.FirebirdClient".

This statement results in a compile error:

            string stCreateConnectionString = new FbConnectionStringBuilder {
                Database = stPathFilename,
                UserID = stUserID,
                Password = stPassword,
                ServerType = FbServerType.Embedded,
                ClientLibrary = stCLIENT_LIBRARY
            }.ToString();

Does not like "stCLIENT_LIBRARY".  What step am I missing?  Thanks!