D26742: Adding new exchangerate-api source for currencies

[Alejandro Valdes]

avaldes added reviewers: ngraham, Frameworks.

REPOSITORY
  R292 KUnitConversion

REVISION DETAIL
  https://phabricator.kde.org/D26742

To: avaldes, ngraham, #frameworks
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns