Stop triggering warnings from inside the query.

Fixes #379
Merge pull request #380 from MZAWeb/feature/remove-trigger-error

Stop triggering warnings from inside the query
update readme; see #380
Validate that connection exists before saving meta

If connection doesn't exist, user will get warnings "Invalid argument supplied for foreach()" in P2P_Box_Factory::save_post() and scbForms::update_meta().
test-coverage: use vendor/bin/phpunit
test-coverage: just show the path (x-www-browser might not be available)
Merge pull request #384 from dimadin/patch-1

Validate that connection exists before saving meta
update changelog after #384
add filter to change the title of already connected posts
Merge pull request #390 from petitphp/connection_title

add filter to change the title of already connected posts
rename filter to 'p2p_connected_title', since we're filtering the title of a connected item.

see #390
bump version to 1.6.2
bump scbFramework to r60