* emacs-lisp/package.el (package--list-packages): Fix column
alignment.
(package--builtins): Tweak descriptions.
(package-print-package): Upcase descriptions if necessary. Show
all built-in packages in font-lock-builtin-face.
(package-list-packages-internal): Omit "emacs" package. Show
status of built-in packages as "built-in".
* lisp/emacs-lisp/package.el (package-archive-base): Var deleted.
(package-archives): New variable.
(package-archive-contents): Doc fix.
(package-load-descriptor): Do nothing if descriptor file is
missing.
(package--write-file-no-coding): New function.
(package-unpack-single): Use it.
(package-archive-id): New function.
(package-download-single, package-download-tar)
(package-menu-view-commentary): Use it.
(package-installed-p): Make second argument optional.
(package-read-all-archive-contents): New function.
(package-initialize): Use it.
(package-read-archive-contents): Add ARCHIVE argument.
(package--add-to-archive-contents): New function.
(package-install): Don't call package-read-archive-contents.
(package--download-one-archive): Store archive file in a
subdirectory of package-user-dir.
(package-menu-execute): Remove spurious line movement.
* lisp/emacs-lisp/package.el (package-load-list, package-archives)
(package-archive-contents, package-user-dir)
(package-directory-list, package--builtins, package-alist)
(package-activated-list, package-obsolete-alist): Mark as risky.
* help-mode.el (help-package): New button type.
* emacs-lisp/package.el (package-print-package): Add link to
package description via describe-package.
(describe-package-1): List package requirements. Add button to
perform installation.
(package-menu-describe-package): New command.
Changes relative to version 0.9 of package.el are listed below:
* emacs-lisp/package-x.el: New file. Package uploading
functionality split out from package.el.
* emacs-lisp/package.el (package-archive-base): Point to
elpa.gnu.org.
(package-enable, package-load-list): New defcustoms.
(package-user-dir, package-directory-list): Turn into defcustoms.
Don't include package-user-dir in package-directory-list.
(package--builtins-base): Don't include Emacs as a "package".
(package-subdirectory-regexp): New var.
(package-load-all-descriptors, package-compute-transaction)
(package-download-transaction): Obey package-load-list.
(package-activate-1): Rename from package-do-activate.
(package-list-packages-internal): Check package-load-list.
(package-load-descriptor, package-generate-autoloads)
(package-unpack, package-unpack-single)
(package--read-archive-file, package-delete): Use
expand-file-name.
* startup.el (command-line): Load packages after reading init
file.
