Can't run Chorus unless included Mercurial is used

[ermshiperete]

It's not possible to use the system provided mercurial. HgRepository.GetMercurialConfigInMercurialFolder() crashes if MercurialLocation.PathToMercurialFolder is not set which is the case if chorus can't find a Mercurial folder.

[jasonleenaylor]

This is by design. In order for Chorus to function we must have extensions enabled at the mecurial.ini level. If we used the system mercurial we would not be in full enough control of the environment. The fixutf8 wrapper which does a bit more than just utf8 fixing now must run on linux and we can't be sure that it will work with any arbitrary mercurial that might be installed.