added 'import' option to cust_pkg->insert to allow setting of historical order_date

also converted 'use vars' to 'our'
Fixed setting of global variable that was missed in last commit
Allow passing of 'allow_pkgpart' and 'import' flags up the chain to FS::cust_pkg->insert
Skipped more parts of insert on 'import'
Switched to using global $commit
Removed passing of import flag now that it is global in cust_pkg.pm
Merge remote-tracking branch 'upstream/master'

Conflicts:
	FS/FS/cust_pkg.pm
Merge branch 'master' of https://github.com/rvandam/Freeside