Minor features and connection error improvement release

Primary improvement is the ability to specify a port other than 14000 for api calls. A 'mgmt_port:' keyword is now available in the 'cluster:' section of the yml configuration file. See Readme for more details.

Feature and bug release 1.6.1

Release 1.6.1

• maximum snapshots per schedule, per filesystem, is now 365
• new UI tab that displays a list of sortable existing cluster snapshots, not just those created by snaptool
• UI config file tab now allows editing of the config file by default. This can be disabled with command line argument --no-edit
• bug fixes, better error checking. Better snapshot name verification before deleting old snapshots.

bug fixes only - max retain behavior

bug fixes only - max retain behavior

Upgrade libraries for security, fix invalid error message about bool.upper

Upgrade libraries for security, fix error message caused by "upload" keyword being parsed as bool instead of string.

No new features in this release, just bug fixes and security upgrades in underlying libraries.

Snaptool with support for remote uploads and status UI

Added status web ui embedded server.
Added support for scheduling remote uploads.