Fix the generation of foreign keys' names
Merge pull request #2 from Dinduks/fix_fk_names

LGTM
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Merge commit 'd2a98f9a4ae1098d095aecea8f93e86435f9fe4d' into slick2.0-support

Conflicts:
	macros/src/main/scala/slickmacros/annotations/ModelMacro.scala