code: function defaultGetter(path, store) {
      var getterExists = store.getters.hasOwnProperty(path);
      if (getterExists)
          return store.getters[path];
      return getDeepValue(store.state, path);
  }
docs: Creates a getter function in the store to set any state value.
  Usage:
  `get('module/path/path.to.prop')`
  it will check first for existence of: `getters['module/path/path.to.prop']`
  if non existant it will return: `state.module.path.path.to.prop`
  Import method:
  `store.get = (path) => { return defaultGetter(path, store) }`
  
  @param {string} path the path of the prop to get eg. 'info/user/favColours.primary'
  @param {IInitialisedStore} store the store to attach
  @returns {*} getter or state