Install evolution-ews by default

[Debarshi Ray]

From Fedora 18 (ie. GNOME 3.6) onwards GNOME Online Accounts lets you
configure your MS Exchange account via EWS, which you can then access using
Evolution:
https://live.gnome.org/ThreePointFive/Features/GoaExchange

However, for Evolution to work, the evolution-ews package is needed.

Any objections to editing comps.xml so that it is installed by default? Its
size is 307 kB.

Cheers,
Debarshi