Flux should detect encoding for console

[cboehme]

From @cboehme on February 12, 2015 8:3

On Windows the system default encoding may not match the encoding of the console flux is running in. For instance, the German version of Windows 7 uses cp1252 as default encoding. The dos shell, however, uses codepage 850. In cygwin the encoding depends on the configuration of the cygwin shell and may also not match cp1252. This can also happen if flux is run as an external tool in eclipse.

There should be a mechanism for detecting the actual encoding of the console.

Copied from original issue: culturegraph/metafacture-runner#5