more phone support for Polycom VVXs
bulk uploader release 1.7

- code refactor
- support for external telephone numbers
- support for external sip addresses
- enhanced - send welcome e-mail flag for uploading users
- enhanced - set organization password, set natkeepalive
help file
show failed uploads in the log
README
fixes bugs and adds features

- fixes the upload on external addresses with usernames that have spaces
- adds support for company directory in phone upload
- adds extension support in external sip address field
readme updated. external resource results cleaned up