Revert "Pin p.a.blob to 1.5.8 to see if that solves problems on travis."

This reverts commit 93f8d30aca66b3a0d4b4c5c937ee7c98dea3ae90.
Revert "Concat js resources."

This reverts commit 2e7019e37cfcb916eb0725a1c07b2182ba44074d.
Use Plone 4.3.2 unified installer.