v1.3.5: Fix install/build Issues

* Pin `less` dep to 1.7.0 as compiled CSS from less >1.7.0 was not playing well with `csso` optimizer.
* Pin `bower` dep to ~1.3.8 as lower versions do not install properly.
* Cleanup: delete checked-in `dist/` build artifacts
Do we need this commented-out line? Can use source control to dig it up later.