Tilføj kommando `fire config`

[kbevers]

Giver mulighed for at få vist den aktuelle opsætning af FIRE-programmet.

Closes #692

[kbevers]

Her et eksempel:

(fire-dev) C:\dev\fire>fire config
[general]
    default_connection = test
    niv_open_files = false

[network-attributes]
    axes-xy = en
    angles = left-handed
    epoch = 0.0

[network-parameters]
    algorithm = gso
    angles = 400
    conf-pr = 0.95
    cov-band = 0
    ellipsoid = grs80
    latitude = 55.7
    sigma-act = apriori
    sigma-apr = 1.0
    tol-abs = 1000.0
    update-constrained-coordinates = no

[prod_connection]
    password = ***************
    username = fire
    hostname = lang.adresse.dk
    service = FIREPROD
    schema = fire

[test_connection]
    password = ***************
    username = fire
    hostname = lang.adresse.dk
    service = firetest
    schema = fire