Fix issue1679: path reconstruction in hgwebdir was mangling things badly

do not translate commit messages It is not very helpful to have 'Added tag %s for changeset %s' and similar messages translated into different languages when people work together using different locales. We now use English strings without support for translations. If needed, the user can still supply a custom string for most commands.

hgignore.5: expanded description - explain that .hgignore must be created manually - hint that it is typically put under revision control