fix(library/aliases): namespace and constant have the same name, and 'using' produces the 'empty' alias

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
chore(library/kernel_serializer): add assertions for invalid uses of anonymous names

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
fix(util/name): avoid assertion violation when reading numeric names

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
fix(library/hott/Makefile): specify LEAN_OPTIONS "--hott"
fix(bin/lmake): fix typo LEAN_OPTIONS
feat(emacs/lean-flycheck.el): add lean-flycheck.el
feat(emacs/lean-settings.el): add customization-settings file
feat(emacs/lean-util.el): add lean-util.el
refactor(emacs/lean-mode.el): clean up, add license
feat(emacs/lean-mode.el): use whitespace-cleanup-mode to fci-mode
fix(bin/lmake): pass lmake option to makefile
feat(emacs/README.md): add README.md