See http://code.google.com/p/v8/issues/detail?id=884

This reverts commit 6dbf4911.

Introduced in f9f0e5c7

Closes GH-579.

Closes GH-586.

Thanks Kevin. Closes GH-518.

Closes GH-557.
Closes GH-539.

Thanks Bjarki. Closes GH-561.

Thanks Pierre. Closes GH-571.

require('./foo/') should not try to load './foo.js'.  It should only
look for ./foo/index.js

Closes GH-588

Hopefully wont get failures on buildbot slaves.

This reverts commit 8bd7e4fa.

This is meant as a path for upgrading to the new http.request() API.
http.Client will be disappearing in the future.

so `node foo`
will load one of:
./foo.js
./foo.node
./foo/index.js
./foo/index.node

Test cases added.
Ensured no conflict with native names.

- Made backward/forward more convenient
- More key bindings that windows users are used to
- Fix delete-word-right
- Duplicate code cleanup