Improve manual's section about batching by making it clear that bind() binds records, not individual values

[lukaseder]

Users might be confused by jOOQ's batch API. The bind() method really binds a complete record, not individual columns. We should probably make this more clear via:

• Indentation: put values under each column
• Adding a line of text

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See also:
https://groups.google.com/forum/#!topic/jooq-user/dZjymQgtE8U

[lukaseder]

Will be published with the next manual release