fixed license headers
.travis.yml: install unixodbc-dev libmysqlclient-dev

Signed-off-by: Roger Meier <roger@bufferoverflow.ch>
Merge pull request #349 from bufferoverflow/travis

.travis.yml: install unixodbc-dev libmysqlclient-dev
fixed GH# 350: Memory leak in Data/ODBC with BLOB
Merge branch 'develop' of https://github.com/pocoproject/poco into develop