`--path` does not interact correctly with relative path arguments

[cbuttner]

Given the cwd structure

./my_project
./my_libraries

The following command does not work

c3c run --path my_project --libdir ../my_libraries

The problem is that the chdir to --path happens after the arguments have been parsed, but the directories are checked during argument parsing.

If I instead run

c3c run --path my_project --libdir my_libraries

then c3c will look for ./my_project/my_libraries and not find it.

[cbuttner]

Also maybe

c3c run --path my_project --libdir my_libraries

should be the way it works instead, so the relative path arguments are relative to the cwd, not the --path.

[lerno]

This should work correctly now, please try it!

[cbuttner]

Fixed!