Typo fixes

Fixing some typos in the readme
Merge pull request #716 from shama/patch-1

Typo fixes
Don't load same module multiple times if resolved from differnt paths

There was an optimization which compared the dependency paths instead of
the hashes if the same modules where compared multiple times. This was
not taking into account that a module might be referenced from multiple
paths.

Removing the optimization solves the issue and does not seem to cause
any noticable performance drops.

- Fixes issue #692
3.38.1
Merge branch 'master' of github.com:substack/node-browserify
Full zlib module support
3.39.0
make the api's opt.builtins a little less broken
stray line
formatting
pass opts.builtins object values directly through
cleanup no builtins test
test for opts.builtins object case
3.40.0
upgrade module-deps
3.40.1
upgrade module-deps to fix #726
3.40.2
Allow piping via stdin and --require at the same time

Fixes #724
3.40.3