Add IDR module

[drpatelh]

Closes #902

[JoseEspinosa]

I think is ready to go @drpatelh . I did not manage to make the test work with bed files, see here some examples, however, seems like the tools has a bug since it always returns something such as an out of index error. I'd guess is expecting more columns... Anyhow, I don't think bed files are widely use for peaks so I will just left this part commented and go ahead.

[drpatelh]

Suggested change

	// workflow test_idr_bed {
	// // Also tried with these two replicates in bed format from this course
	// // (http://jvanheld.github.io/cisreg_course/chip-seq/practical/annotation.html) and did not work
	// // http://pedagogix-tagc.univ-mrs.fr/courses/data/ngs/td_chip_seq/all/siGATA_ER_E2_r1_SRX176857_peaks.bed
	// // http://pedagogix-tagc.univ-mrs.fr/courses/data/ngs/td_chip_seq/all/siGATA_ER_E2_r2_SRX176859_peaks.bed
	// input = [
	// //Does not work with the data in test-datasets
	// // file(params.test_data['sarscov2']['genome']['test_bed'], checkIfExists: true),
	// // file(params.test_data['sarscov2']['genome']['test2_bed'], checkIfExists: true)
	// // Also tried to see weather it swallow the same file as narrow and broad mode, but it does not
	// // file('https://raw.githubusercontent.com/kundajelab/idr/master/tests/data/peak1', checkIfExists: true),
	// // file('https://raw.githubusercontent.com/kundajelab/idr/master/tests/data/peak2', checkIfExists: true)
	// ]
	// IDR ( input, 'bed', 'test' )
	// }