add a link to the Node.js API Docs

[frabrunelle]

We could add a link to http://docs.maidsafe.net/safe_app_nodejs/ in the README to make it easier for people to find the documentation 🙂

[coveralls]

Coverage remained the same at 83.932% when pulling ea9817f on frabrunelle:docs into 9ddf844 on maidsafe:master.

[coveralls]

Coverage remained the same at 83.932% when pulling 939a264 on frabrunelle:docs into 9ddf844 on maidsafe:master.

[coveralls]

Coverage remained the same at 83.932% when pulling 939a264 on frabrunelle:docs into 9ddf844 on maidsafe:master.

[coveralls]

Coverage remained the same at 83.932% when pulling ea9817f on frabrunelle:docs into 9ddf844 on maidsafe:master.

[coveralls]

Coverage remained the same at 83.932% when pulling 0cf8c76 on frabrunelle:docs into 9ddf844 on maidsafe:master.

[coveralls]

Coverage remained the same at 83.932% when pulling 0cf8c76 on frabrunelle:docs into 9ddf844 on maidsafe:master.

[coveralls]

Coverage remained the same at 84.477% when pulling 4b8092d on frabrunelle:docs into 2763a3f on maidsafe:master.

[coveralls]

Coverage remained the same at 84.414% when pulling 398723c on frabrunelle:docs into ae62c5e on maidsafe:master.

[coveralls]

Coverage remained the same at 84.414% when pulling 398723c on frabrunelle:docs into ae62c5e on maidsafe:master.

[coveralls]

Coverage remained the same at 84.008% when pulling e1ecb7e on frabrunelle:docs into 8ef42f7 on maidsafe:master.