Remove object I/O: CsvObject & CsvBean reader & writers

[thekid]

...making this libary more minimalistic

Before

github.com/AlDanial/cloc v 1.82  T=0.05 s (295.7 files/s, 17286.9 lines/s)
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Language                     files          blank        comment           code
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PHP                             15             85            371            421
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After

github.com/AlDanial/cloc v 1.82  T=0.04 s (278.1 files/s, 17219.2 lines/s)
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
PHP                             11             67            278            336
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