use more concise type definition
merge test functions to reduce compilation time
more unit tests
update from upstream
Merge branch 'master' of https://github.com/RcppCore/RcppEigen into unittest
cleaned code and added some missing tests
test for transformation on 2D array
added tests for mapped sparse matrices
correct output message
changelog update
Merge pull request #14 from yixuan/unittest

Cleanup and improvement of unit tests