updating the Checking/Loading package function to attempt a list of packages and summarize the outcome by the end

Author	Marcelo Ponce <mponce@scinet.utoronto.ca>
Author date	2019-04-28 22:11:04
Author local date	2019-04-28 18:11:04 -0400
Committer	Marcelo Ponce <mponce@scinet.utoronto.ca>
Committer date	2019-04-28 22:11:04
Committer local date	2019-04-28 18:11:04 -0400
Commit	e413459b09f92943cc4aa53d948d4198accc27a1
Tree	3d15d84b7a96aa12e2e8a808d59d8f3d9504d388
Parent	e5c3be16ee6556b267f75d114a3c0ede216a20fd

updating the Checking/Loading package function to attempt a list of packages and summarize the outcome by the end

Affected files:
tools/compare.R