Fix a compilation error due to missing header file.
Merge pull request #108 from kprav33n/master

fix a compilation error due to missing header file
CMake: automatically extract the package version from irony.el

This avoids to maintain the 2 versions in sync.
CDB: trim whitespace in .clang_complete lines
remove byte compilation from test files
do not display irony-cdb-menu tip if there is no errors

fixes #55
fix typo in FindLibClang.cmake (fixes #110)