Revert to last-known-working version of paradise-2.10

Not sure what is going wrong here, but I suspect it is related to
one of:

https://github.com/scalamacros/paradise/commit/ede29e7f9d6820f063391e045e62063c4893152d
https://github.com/scalamacros/paradise/commit/d1284c776cac657b91a2e63f59bdbd8fd7dba50b
Merge pull request #45 from retronym/topic/paradise-fix

Revert to last-known-working version of paradise-2.10