1.6.2

v1.6.2 | Jul 13 2017:
[Fix] signature updates using get_remote_file() would incorrect write temporary update files into /; issue #242
[Fix] added 'which curl' and 'which wget' for variable scoping of binary locations into internals.conf; issue #237
[New] added support to send email through 'sendmail' binary as alternative to 'mail'; pr #241 & issue #238