v0.9.37
redmine 2.3 compatibility

workaround redmines pinned capybara
remove Iconv from active code
fix issue query filters
fix featuretests
update redmine_install
test for release burndown csv
Merge pull request #886 from backlogs/redmine-2.3-compat

redmine 2.3 compatibility
travis for rm 2.2.4 and 2.3.0
Merge remote-tracking branch 'origin/master' into release_graphs

Conflicts:
	features/release_burndown.feature