Revert "Removed redundant uglification"

This reverts commit 86373d924cd5f5808e3da72ceb2bf171bc9142f0.
Revert "More optimizations and fix for JSXTransformer build"

This reverts commit f1b7db9aef57d5b2a9264b51e4303540772f847f.
Revert "Switched from browserify to pure-cjs bundler."

This reverts commit bff9731b66093239dc0408fb1d83df423925b6f9.
Merge pull request #1016 from benjamn/revert-pure-cjs-until-0.9

Revert commits switching from browserify to pure-cjs (on hold until after v0.9 ships).