Fixed all warnings in the project

Makefile

README.md

src/graphics/opengl/Window.cpp

src/graphics/opengl/Window.h

src/graphics/opengl/components/BoxComponent.cpp

src/graphics/opengl/components/BoxComponent.h

src/graphics/text/TextRasterizer.cpp

src/graphics/text/TextRasterizer.h

src/html/HTMLParser.cpp

src/html/Node.cpp

src/html/Node.h

src/html/TagNode.cpp

src/html/elements/BLOCKQUOTEElement.cpp

src/html/elements/H1Element.cpp

src/html/elements/H2Element.cpp

src/html/elements/H3Element.cpp

src/html/elements/LIElement.cpp

src/html/elements/PElement.cpp

src/html/elements/SPANElement.cpp

src/main.cpp