modified old RcppTestA package to testRcppPackage

updated test for source package slightly
also update DESCRIPTION of inst/unitTests/testRcppPackage/DESCRIPTION and update ChangeLog
new binary test of pre-built .deb package

intented for Travis only, with test for Linux && Travis && extended tests
will help to ensure we do not accidentally alter the ABI
do not exclude bin/ via .Rinstignore as we need the binary package for testing
version number is now 0.1.0
be more specific about where we load the package from
merged from branch
Merge commit '5dfe9a0fe3ac3fed395a7e4a4c5080575370a555' into feature/binary-build-tests
Merge pull request #198 from RcppCore/feature/binary-build-tests

Feature/binary build tests