Calculator: Improve German translation

Patch Set 1:    * rename some strings

Patch Set 2-3:  * add translations for 'Col' and 'Row'

Change-Id: I8c33281877eefa179941c91d98e6701c228e24ae

Conflicts:

	res/values-de/strings.xml
Contacts: Added missing Polish translations

Patch Set 2:Fixed a typos

Change-Id: I14da3b6def95c0ac650246bc90fc16f9faeeaddc

Conflicts:

	res/values-pl/strings.xml
Fix build warnings.

Change-Id: I9562d53c5d636533070e9f29cda7d6e4bb770e44

Conflicts:

	res/values-fr/strings.xml