[API] Include ImPlot (#56)

* Add implot submodule.

* Add implot to generateLibs

* Add _implot.h

* Add placeholder ImPlot java classes.

* Create demo window.

* Try to show the ImPlot demo in the window.

* Create ImPlot context.

* Fix final check.

* Implement ImPlotFlags.

* Implement the rest of the enums.

* Make classes final.

* Implement ImPlotContext and related methods

* Added more methods to ImPlot wrapper (mostly plot utils)

* Implement ImPlotPoint

* Implement ImPlotRange

* Switch native method to static in ImPlotPoint

* Implement ImPlotLimits

* Finish ImPlot Plot Utils bindings

* Implement more ImPlot methods (Miscellaneous)

* Implement more ImPlot methods (Legend utils/tools)

* Implement more ImPlot methods (Drag and drop utils)

* Implement more ImPlot methods (Plot tools)

* Implement more ImPlot methods (most plot items)

* Fix compile error (casting to double and not Double)

* Fix ImDrawData.getCmdListCmdBufferTextureId()

* Implement more ImPlot methods (rest of plot items)
(except for PlotImage, which is not currently supported)

* Fix ImGui binding problems due to API changes

* Adhere to style guidelines.

* Fix imguizmo submodule

* Fix API

* Implement ImPlotStyle

* Implement more ImPlot methods (Plot and Item styling)

* Implement remainder of ImPlot methods (Colormaps)

* Modify ImPlot example program

* Fix ImPlot example program bug

* ImPlot bugfixes

* Update ImPlot Demo

* Revert merge errors.

* Make the submodules the version on master.

* Fix URL/style in ExampleImPlot

* Fix merge conflicts with example ImPlot context creation

* Remove unneccesary static block for field declarations

* Revert libimgui-java64.so

* Change construction to use define (vs passing a pointer)

* Fixed memory leaks
Changed ImPlotLimits, ImPlotRange, and ImPlotPoint to extend ImGuiStructDestroyable instead of ImGuiStruct so user-created instances can be destroyed. Methods that create instances that must be destroyed manually specify this in the docs.

* Fix style violations

* Fix compile error

* Replace exception type

Co-authored-by: Perry MacMurray <perrymacmurray@gmail.com>
Co-authored-by: Perry <pmacmurray@ihmc.org>
Co-authored-by: SpaiR <klimbetoo@gmail.com>

buildSrc/src/main/groovy/imgui/generate/GenerateLibs.groovy

@@ -46,7 +46,7 @@ class GenerateLibs extends DefaultTask {
 
         // Copy ImGui h/cpp files
         project.copy { CopySpec spec ->
-            ['include/imgui', 'include/imnodes', 'include/imgui-node-editor', 'include/imguizmo'].each {
+            ['include/imgui', 'include/imnodes', 'include/imgui-node-editor', 'include/imguizmo', 'include/implot'].each {
                 spec.from(project.rootProject.file(it)) { CopySpec s -> s.include('*.h', '*.cpp', '*.inl') }
             }
             spec.from(project.rootProject.file('imgui-binding/src/main/native'))