Pull Request:- pull_req

[Vibhor Verma]

Dear Sir,

I added a small feature to powershell script file setup/install_emerge.ps1
that if the *installRoot* exists in the location we are installing emerge.

Then user get 3 options:-

   1. Truncate installRoot and install emerge in it.
   2. Change installRoot location. It also proposes new directory name as
   default with suffix string "*(1)*" to the user.For Example:- if
   installRoot chosen is *d:\kderoot*, then it will propose new directory
   name as *d:\kderoot(1)*.
   3. Quit installation.

I have explained about the changes I made. Expecting comments or feedback
about the change i made whether the changes made are fine or they are not
right as it is *my first contribution to opensource and to kde* and so that
i could improve next time.

Expecting a prompt reply from your side.

Regards

Vibhor Verma
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