decode-csv: Header seems not to be default

[TobiasNx]

When trying to decode-csv the option hasHeader is not "true" by default. This seems contrary to the the inline documentation and the documentation in flux-commands.md:

metafacture-core/metafacture-csv/src/main/java/org/metafacture/csv/CsvDecoder.java

Line 32 in 57fd430

* Decodes lines of CSV files. First line is interpreted as header.

[dr0i]

You are right!
Fixing the code would mean an API break so we should just fix the documentation.

[TobiasNx]

This seems to be fixed by @dr0i

metafacture-core/metafacture-csv/src/main/java/org/metafacture/csv/CsvDecoder.java

Line 33 in 27780be

* Decodes lines of CSV files. First line may be interpreted as header.

in: #396