Update README.md

More environment variable settings
Merge branch 'develop' of github.com:drugis/addis-core into develop

Conflicts:
	README.md
Merge branch 'develop' of github.com:ConnorStroomberg/addis-core into develop

Conflicts:
	src/main/java/org/drugis/addis/analyses/Analysis.java
	src/test/java/org/drugis/addis/analyses/AnalysisRepositoryTest.java
Add study query to trialverse API