Merging from upstream.
Merge remote branch 'upstream/master'.

Conflicts:
	import_layer/pom.xml
Merging the layering branch, now ISATAB-export uses the new version of graph2tab.
Merge remote branch 'upstream/master'.
Merge pull request #30 from marco-brandizi/master

Upgraded to the new graph2tab
Removing google collections dependency. I don't see it used anywhere.
updating to SRA-1.3
Merge pull request #31 from proccaserra/master

upgrade SRA exporter to Schema 1.3
Merge branch 'master' of github.com:ISA-tools/ISAvalidator-ISAconverter-BIImanager
adding to SRA-1.3
Merge pull request #32 from proccaserra/master

oops....please get the schema
setting default data set in SraExportTest.java
Merge pull request #33 from proccaserra/master

SRA test fix
changing required value for target_taxon to non required
Merge pull request #34 from proccaserra/master

minor fix in metadata requirement: SRA exporter
Merge branch 'master' of github.com:ISA-tools/ISAvalidator-ISAconverter-BIImanager
Upgrade to version 1.3.3
Addition of validation option in simple manager and a validate.sh script too.
Upgrading configurations and upgrading version of tools to 1.4
Final fixes to configurations.