BUGFIX: crash rendering a StackedLayoutLR with legends
Merge pull request #23 from DougBurke/patch

BUGFIX: crash rendering a StackedLayoutLR with legends
Added tests of StackedLayoutLR items for changeset 4affe87847245f05d60e0ad8f433fa9b85ffb2f3

This commit does not add PNG/SVG versions of the new tests (test11c/d/e) to tests-reference/
Chart and Chart-diagrams build fine with lens-4.0.*
update Chart-diagram to work with diagrams-lib-1.1
BUGFIX: VTA_BaseLine was not supported by rlabel.

Also added a number of test cases (misc1b to misc1g) which show that rotated labels with VTA_BaseLine are not displayed correctly. No reference files for these tests have been added.
Merge pull request #25 from byorgey/master

Updates to allow Chart-diagrams to build with latest diagrams release
Merge pull request #24 from DougBurke/patch

Added tests of StackedLayoutLR items (pull request #23)
Additional version constraints for package consistency
The test reference images are out of date, and depend on external
libraries (eg cairo and diagrams) for pixel accuracy. So, I've
removed them - the existing harnesses can be used to generate a
set of test images as required.
Fix behavior of rlabel with VTA_BaseLine.

This fix is most noticeable with rotated labels.
Add missing exports.

This update adds some missing exports from modules, removes un-used module imports, fixes one partial function, and minor documentation tweaks.
Add missing imports.

Adding to changeset 65b5308591dc0a837103b57651af4860c0d235db
Code cleanup: -Wall/hlint

Changes include: use -Wall for building; cleanup to avoid -Wall warnings; apply hlint suggestions; more use of Control.Lens
Merge remote-tracking branch 'origin/master' into patch
Avoid warnings with lens-4.0

This change will cause warnings when compiled with lens<4; I did not feel it was worthwhile using CPP to avoid this
Merge in changes from origin/patch branch