Made Timer implementation C++98 compliant and using platform-specific
libraries.
Merge pull request #25 from DO-CV/maint-remove-c++11-timer-implementation

Made Timer implementation C++98 compliant
Set up adequate compilation flags (Release, Debug).
Set compilation in Release mode by default.
Merge pull request #26 from DO-CV/fix-release-compilation-flags

[FIX] Setup correct compilation flags
Added a brief note for building the libraries.
Merge pull request #27 from DO-CV/maint-update-doc

[MAINT] Added a brief note for building the libraries.
Fixed documentation.
Replaced `uchar` by `unsigned char`.
Merge pull request #28 from DO-CV/maint-core-color-fix-doc

[DO.Core] Fixed some documentation on `Color.hpp`
Merge pull request #30 from DO-CV/fix-do-graphics-compilation

[DO.Graphics][FIX] Replaced `uchar` by `unsigned char`.
Merge remote-tracking branch 'origin' into fix-image-processing-cmake