* changed libopenspace cmake module name to openspace-core
* change mouse button callback to include modifiers
* added some new ghoul initialization from the non-MinVR main.cpp
* Add GLFW as an external dependency for MinVR

* Expose `CMAKE_BUILD_TYPE` to cmake gui (for single configuration generators)
* Use generator expressions to get debug vs release mode
* Fix mac app icon

* Cleanup
* CMake cleanups
* Update current year
* Update copyright header
* Use script to return list of all modules
* Update credits, license and ghoul

 * Move SGCT external library from ext/sgct to apps/OpenSpace/ext/sgct
 * Remove all GLFW dependencies from openspace-core
 * Add MinVR dependency
 * Add new executable OpenSpace-MinVR that uses MinVR instead of SGCT

* Sweeping CMake cleanup
* Cleaning up message log in CMake

Web GUI from Klas Eskilson (three new modules: webgui, webbrowser and cefwebgui)
Parallel connection refactorization
Wormhole server added to the main repository
Transfer function editor work from Cristoffer Särevall
Update ghoul

 * Adding ScreenSpaceSpout object to display spout textures in screen space
 * Enable the clearing of option properties
 * Fix crash in ScreenSpaceImageLocal specification
 * Split RenderablePlane into RenderablePlaneImageLocal and RenderablePlaneImageOnline
 * Add RenderablePlane Spout
 * Rename Texture parameter in ScreenSpaceImageOnline into URL

Closes #518

Add icon to AppBundle

* Rename OnScreenGui module to ImGui
* Support multiple external module folders (closes #31)
* Cleaning up CMake files
  * Restructure application specification
  * Add parameter for library mode to all modules
  * Add functions to handle global variable state
* Misc/remove warnings (#383)
* Increase build timeout and do a clean rebuild every commit

* Add initial Spout implementation

* Some cleanup

* Updated SGCT to latest commit, to include OpenVR convenience functions.

* Made OpenSpace application support OpenVR. Check CMake option "OPENSPACE_OPENVR_SUPPORT" to enable this functionality.

* Merged latest SGCT to remove ogl_header dependency in SGCTOpenVR header

* Merged latest SGCT with minor Mac gl/glew include fix for including SGCTOpenVR as it relies on inclusion of gl headers.

* CMake fix in OpenSpace app for resetting variables after unchecking OPENVR_SUPPORT.

* Created separate SGCT config files for Oculus Rift and HTC Vive HMD

* Update Ghoul to enable experimental GLM features

* Update SGCT repository

* Updated to latest SGCT version for latest fixes.

Moving fieldline rendering into its own module