Revert "install numpy sys dependencies first"

This reverts commit 6d52cb71b944d28fd38abed0b92abc95ccc4605d.
Revert "ignore comments in requirements.txt file"

This reverts commit 398408ca8a006d55c24961d4def8240a49857057.
Revert "installation problem in scikit-bio, need to install numpy here"

This reverts commit 94f6b8771ec37948f708b62753544db8625376f9.
Revert "adding crosenth to travis email list"

This reverts commit c9c80cf1b846291f5b56def3bd75dbf09c2a8544.
Revert "include wheel location when installing setup.py"

This reverts commit 6cc17578588ea783bf465217fdd1bdfe8f87f5df.
Revert "specifying required installs outside tax2tree"

This reverts commit 09317130e4e854bb86e8a86696da77d64e725fe3.
Revert "tax2tree now specifies its own dependencies"

This reverts commit 1ffbb71aa9a25eb615b904a93fb01c2d517d5a3a.