QCFasta image annotations

[Alejandra Cervera]

In the quality control figures it would be nice to specify that the left top figure is the raw read, the left bottom is the raw mate (when paired), the right side is the same but after qc trimming. I think this can be added when the ImageGallery is created using the annotations input/parameter.

[Chiara Facciotto]

Now all figures have a caption explaining the meaning of each plot.

[Chiara Facciotto]

Resolved for plots by Sample but not for plots by Type

[Chiara Facciotto]

Now the text is available for both, but needs to be customized.

[Chiara Facciotto]

QCFasta image annotations working for single and paired-end reads.