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/**
 * Converts an RGB color value to HSL. Conversion formula
 * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
 * Assumes r, g, and b are contained in the set [0, 255] and
 * returns h, s, and l in the set [0, 1].
 *
 * @param   Number  r       The red color value
 * @param   Number  g       The green color value
 * @param   Number  b       The blue color value
 * @return  Array           The HSL representation

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```
# /etc/hosts

127.0.0.1    node.server.local
```

```
# httpd.conf

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brew cask install xquartz
brew tap osgeo/osgeo4mac
brew unlink python && brew link --force python
brew reinstall ninja gsl python qt osgeo-sip osgeo-pyqt osgeo-pyqt-webkit osgeo-qscintilla2 six bison flex pkg-config
brew link --overwrite osgeo-pyqt
brew unlink gettext && brew link --force gettext 
ulimit -n 2048
brew install osgeo-qgis