Including LICENSE, and switching headers to LGPL
@samoht what about the included GPL v2 'apalog' ?
Merge pull request #56 from AltGr/lgpl-headers

Including LICENSE, and switching headers to LGPL
Let scripts specify the installdir
(with `PREFIX=~/local make install`. Better than nothing
Merge pull request #57 from AltGr/specify-prefix

Allow specifying install PREFIX from the outside
Get package update dates from git if available
Merge pull request #58 from AltGr/dates-from-git

Get package update dates from git if available
Fix uncaught exception when opam files have errors
Merge pull request #59 from AltGr/fix-Not_found

Fix uncaught exception when opam files have errors
Fixed crash when trying to build pages for broken packages
Merge pull request #60 from AltGr/fix-Not_found-2

Fixed crash when trying to build pages for broken packages