ChromHMM enhancer extension

[LeonHafner]

This pull request introduces the Enhancer Prediction with ChromHMM, as described in Issue #63. The changes have not yet been tested and are not yet complete.

TODO:

• [x] Add better way to create the cellmarkfiletable using the input csv for ehmm
• [x] Add java container for BINARIZE_BAMS and LEARN_MODEL processes
• [x] Get parameters from the config file (organism, genome version, ...)
• [x] Add nf-core meta object to the input and output channels of the processes

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[LeonHafner]

I integrated the ChromHMM workflow into the main pipeline and testet it. This part should be done from my side and can be merged. Feel free to make any necessary corrections before approving the merge.

[LeonHafner]

I integrated the output of ChromHMM/Rose into the pipeline. This should finish the work on ChromHMM/Rose. Feel free to merge the PR or request further changes if needed.