salesforcer 0.1.1

Features

• Add sf_search() with REST and SOAP API support for SOSL and free text search
• Add sf_describe_objects() with REST and SOAP API to return object metadata
• Add REST API support for upsert (sf_upsert())
• Add SOAP API support for the following operations:
  • sf_create()
  • sf_update()
  • sf_delete()
  • sf_retrieve()
• Add Metadata API support for the following operations:
  • sf_create_metadata()
  • sf_read_metadata()
  • sf_update_metadata()
  • sf_upsert_metadata()
  • sf_delete_metadata()
  • sf_describe_metadata()
  • sf_list_metadata()
  • sf_rename_metadata()
  • sf_retrieve_metdata()
  • sf_deploy_metdata()
• Make the default file name for a cached token .httr-oauth-salesforcer so that
  it does not clash with other package token names

Bug Fixes

• sf_user_info() returning argument is of length zero because token is not
  automatically refreshed before calling GET

• sf_token() ignoring basic auth'ed sessions since it was only looking for a token
  using token_avaiable(). Replace with sf_auth_check() so now it considers a
  session or a token to be "available" (#1).