Add more information to the help section.

[mthang]

Hi there,
There is a request from a user who wants to have a little more details on the help section. I am going to expand the help section a bit to include the description of the input and output file format.

galaxytools/tools/metilene/metilene.xml

Line 129 in 4fa66bd

Thanks,

[bgruening]

Cool thanks