v0.7.0: Merge pull request #20 from yuki-koyama/travis

This release does not change any APIs but offers the following changes:

• Travis CI set up
• Support of Eigen3 before 3.3
• Support of Qt5 before 5.6

Now Ubuntu 16.04 LTS users can use Eigen/Qt5 features by installing them with apt install libeigen3-dev qt5-default.

v0.6.0

This release includes the following changes:

• Cividis, a new colorblindness-friendly colormap, is supported.
• Require Qt 5.6 or above explicitly for the Qt-related features

v0.5.0

This release includes the following changes:

• Add optional Qt and Eigen features
• Make the CMake organization better
• Improve misc.

v0.4.1

This release includes the following important changes:

• Define operators for Color struct as inline, which resolves compiler errors that occur when multiple source files include tinycolormap.hpp

v0.4.0

This release includes the following important changes:

• Change the file location; now tinycolormap.hpp is in the include subdirectory
• Add a library definition to the cmake file, which allows users to include this library simply using add_subdirectory

0.3.1

This release includes the following change:

• Use explicit constexpr declarations for color tables, which may help avoid potential runtime constructions

0.3.0

This release includes the following important changes:

• Remove Eigen dependency, which improves portability

0.2.0

This release includes the following important changes:

• Change the extension from .h to .hpp
• Move the main file to the root directory
• Improve the equation of the Jet colormap