Removed dependency on OMP.
Merge pull request #151 from Fraser999/MAID-235_remove_omp

MAID-235: Removed dependency on OMP.
Added CMakeLists.txt for Cereal.
Fixed installer code for updated cereal path.
Merge pull request #152 from Fraser999/MAID-59_cereal_cmake

Added CMakeLists.txt for Cereal.
Revert "Added CMakeLists.txt for Cereal."
Merge pull request #153 from maidsafe/revert-152-MAID-59_cereal_cmake

Revert "Added CMakeLists.txt for Cereal."