Better default installation path

[Diggsey]

Installing directly to C: by default is a little obnoxious, especially with the vague warning about permission issues (which makes no sense, since C: typically has the strictest permissions.)

It gives no idea what the installer is actually going to install, or what permissions it requires, making it hard to override it with a better choice.

Binaries should normally be installed to the "program files" directory, and user-specific configuration to the user's AppData folder.

[rpottsoh]

The default location that it is indicating is c:\Exercism.

Some users have run into issues when they attempt to install to Program Files. Creating a folder off of root has proven to be the least problematic for everyone so far thus my default suggestion of c:\Exercism.

The installer is installing the CLI (exercism.exe) which may also be installed manually, the installation walkthrough will guide the user through the process. The installer is simply downloading the latest released version of the CLI and placing the EXE where the user has indicated, nothing else. The CLI handles the configuration aspect of itself. I can't recall at the moment where the general configuration file for the CLI is stored. I am not involved in the development of the CLI.