analogsea v0.7.0

NEW FEATURES

• Now using package ssh to do ssh operations instead of shelling out via system/etc. (#143) (#160) & various fixes for ssh (#154)
• New functions for working with DO certificates API routes: certificate, certificate_create, certificate_delete, certificates, and as.certificate (#156)
• New functions for working with DO firewalls API routes: firewall, firewall_add_droplets, firewall_add_tags, firewall_create, firewall_delete, firewall_remove_droplets, firewall_remove_tags, firewall_update, firewalls, and as.firewall (#157)

MINOR IMPROVEMENTS

• Changed default droplet size from "1gb" to "s-1vcpu-2gb" (#149) (#152)
• Changed default droplet image from "ubuntu-14-04-x64" (Ubuntu 14) to "ubuntu-18-04-x64" (Ubuntu 18) (#151)
• fix docklet_create() to use by default the image "docker-18-04" instead of "docker" (#174)
• Add more documentation for how to deal with droplet object not have the IP address. Happens when the DO API tells R that the droplet is up, but they haven't given us the IP address yet (#166)
• Package gains new manual page ?droplet_functions to help the user navigate the many functions for working with the DO API
• droplet_ssh gains new parameters keyfile and ssh_passwd for specifying the user's optional private key file, and the optional passphrase or callback function for authentication

BUG FIXES

• fix to user and password params for docklet_rstudio(): at first thanks @nielsaka for (#170) (#171) but then we decided better to go with (#172) and make both params required with no default so the user is forced to set their own values
• Change default value for ssh_keys param in droplet_create() and related functions to NULL (#144)