Added lines before namespace fixers
feature #879 Add SingleBlankLineBeforeNamespaceFixer and NoBlankLinesBeforeNamespaceFixer (GrahamCampbell)

This PR was merged into the 1.5 branch.

Discussion
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Add SingleBlankLineBeforeNamespaceFixer and NoBlankLinesBeforeNamespaceFixer

NoBlankLinesBeforeNamespaceFixer is a contrib level fixer, and OneBlankLinesBeforeNamespaceFixer is a symfony level fixer.

Commits
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5af3475 Added lines before namespace fixers