Add package for The Silver Searcher.

Remove sudo from pip commands

Add stack package

Add lsb_release package

Add aspell package

Fix mandb to get apropos working

Fix gdrive package to include only supported architectures

Update dropbox from 28.4.14 to 29.4.20

Fix aircrack_ng sha256 hash

Change crew to not automatically install buildessential

Remove sha1 related stuff

Change heroku.rb to use sha256sum.  Heroku.rb itself may has a problem like #829 discussion, though.

Add coreutils package

Add datamash package

Add help2man package

Add mtools package

Add pexec package

Add httrack package

Correct dependencies