xcmsTutorials version 1.1.0

Version 1.1.0 of the Exploring and analyzing LC-MS data with Spectra and xcms tutorial. This version bases on (and uses) packages available through Bioconductor release 3.19.

Associated with the source code is a docker image xcms_tutorials (tag RELEASE_3_19) that, based on Bioconductor's official RELEASE_3_19 docker image, provides all required (and installed) software packages, data files and the source code of the tutorial.