Fix links in README

update travis to test on 18 and 17.5

pass failing upgrade case where levels are increased

Fix reporting of error:undef exceptions

The wide-cast catching of undef errors would make it so any provider
calling an undefined function would be reported as a missing 'do' for
the provider.

This patch inspects the stacktrace to know if `Provider:do/1` is indeed
the missing callback, and reports the rest properly.

upgrade erlware_commons, bbmustache and relx

Only have the port cd, not rebar3 as a whole

don't run unnecessary code if hooks are empty list

handle http:// git deps in check fif upgrade needed

ensure necessary directories exist to compile mibs files

always close port when done with it. fixes #589

Add proxy support to bootstrap and rebar3. Enhancement #561.

Changed cases on robocopy so it uses variables in a better way

Robocopy fix for different behaviour when copying/moving files and folders

Run agent as current process & hibernate

This tries to reduce memory usage when running `rebar3 shell` by running
the agent in the current process (and avoiding to copy state
cross-boundaries), and using frequent hibernation after each run to
force a full GC and compaction of the current process.

wip: deps install refactor

Minor refactors

remove `cover_print_enabled` and `cover_data_dir` config options and replace with `cover_opts`

Apply profiles properly & load all paths

and replace with `cover_opts`