Merge pull request #31 from hugovdm/units-staging-getConversionRatesInfo

Add unitsdata.cpp, getConversionRatesInfo, and unit tests.

diff --cc icu4c/source/i18n/i18n.vcxproj
Simple merge

diff --cc icu4c/source/i18n/i18n_uwp.vcxproj
Simple merge

diff --cc icu4c/source/test/depstest/dependencies.txt
Simple merge

diff --cc icu4c/source/test/intltest/unitstest.cpp
Simple merge

diff --cc icu4c/source/test/testdata/units/unitPreferencesTest.txt
Simple merge

diff --cc icu4c/source/test/testdata/units/unitsTest.txt
Simple merge