Integration of dictionary package

[Torsten Hilbrich]

Hello,

by suggestion of Jean Louis I have started integrating the dictionary
package (found on https://github.com/myrkr/dictionary-el/).

The work can be found on the feature/integration-of-dictionary-el branch.

It contains the following commits:

b6227446d9 Importing dictionary module
658ec3ccee Renamed connection.el
e2ebffdd62 Renamed link.el
723906c444 Removed some compability parts in dictionary

I plan to integrate some future changes:

- support for dictionary-search to have the highlighted region as default
- support for initially looking up on localhost and the switching to
dict.org

Thanks for reviewing,

        Torsten