pema v.2.1.4

This new PEMA release (Docker image can be found here) has the following:

• it is based on this new pemabase (see Dockerfile.pemabase)
• this new pemabase (v.2.1.1) image is now available addressing issue #31
• the perSample outputs have been fixed (bug issue #25 )
• enhanced convertion of non ena format raw data (issue #19 )
• bugs during the analysis of 18S data have been fixed (issues #22 and #24 )
• a sannity_check folder with datasets and parameters files for multiple combinations are now available, so tests can be performed to check whether pema runs properly after edits.