Use _.result to allow defining localStorage as a function
model.id can be 0

Casting to bool is good, but what if the model id is 0? This is an issue for me right now on a mongo database.
Merge pull request #155 from slamborne/patch-1

model.id can be 0
Merge pull request #151 from nbergseng/master

Use result (duplicated from _.result) to allow defining localStorage as a function
Delete outdated comments
Merge pull request #156 from richardchen331/delete_outdated_comments

Delete outdated comments
Fixed a regression with the parsing of models
Optimize dependencies
Add backbone to devDependencies
Add .npmignore
Merge pull request #160 from eush77/dependencies

Optimize dependencies
Merge pull request #161 from eush77/npmignore

Add .npmignore