.gitignore: Ignore deps
package.json: Replace str_copy with strdup

Fixes deprecation notice (#13)
strsplit.c: Use strdup
Merge pull request #14 from jwerle/replace-str-copy

Replace str copy with strdup
Merge branch 'master' into fix/travis-setup

* master:
  strsplit.c: Use strdup
  package.json: Replace str_copy with strdup
  .gitignore: Ignore deps