Give every package its own directory in packages/

including single-file packages.

diff --git a/packages/all.el b/packages/all/all.el
similarity index 100%
rename from packages/all.el
rename to packages/all/all.el

diff --git a/packages/epoch-view.el b/packages/epoch-view/epoch-view.el
similarity index 100%
rename from packages/epoch-view.el
rename to packages/epoch-view/epoch-view.el

diff --git a/packages/js2-mode.el b/packages/js2-mode/js2-mode.el
similarity index 100%
rename from packages/js2-mode.el
rename to packages/js2-mode/js2-mode.el

diff --git a/packages/load-dir.el b/packages/load-dir/load-dir.el
similarity index 100%
rename from packages/load-dir.el
rename to packages/load-dir/load-dir.el

diff --git a/packages/markchars.el b/packages/markchars/markchars.el
similarity index 100%
rename from packages/markchars.el
rename to packages/markchars/markchars.el

diff --git a/packages/rainbow-mode.el b/packages/rainbow-mode/rainbow-mode.el
similarity index 100%
rename from packages/rainbow-mode.el
rename to packages/rainbow-mode/rainbow-mode.el