Migrating NomParser to 'cdk-legacy'.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Move all 'cdk-qm' code to 'cdk-legacy'. The custom PMD rulesets (no removed) seem no different from '/pmd/custom-data.xml' and was not specific to 'qm' code.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>

Conflicts:
	legacy/src/test/java/org/openscience/cdk/math/GaussiansCalculationTest.java
	misc/qm/src/test/java/org/openscience/cdk/coverage/QmCoverageTest.java
	misc/qm/src/test/java/org/openscience/cdk/modulesuites/MqmTests.java

Change-Id: Icf6b051d50a0931e23fa16ea08b4a039a6eac219
Resolve review comments. Ensure copyright is intact and added a hyperlink.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>