Add utils for working with endianness, more documentation, refactor CMake

Decided to update the docs, as well as adding few new features and small
refactoring.

README.md

@@ -0,0 +1,30 @@
+# BHLib
+
+Library with a bunch of stuff
+
+## About
+
+Here is a short list of implemented features:
+
+- Abstraction over input/output
+- Basic data structures and algorithms (hashmap, queue, heaps, partitions)
+- Geomtric primitives (vectors, matrices, quaternions, rays, boxes)
+
+For more information about currently implemented and planned features checkout
+[this page](doc/Features.md)
+
+## Docs
+
+The documentation for the functions is provided in the form of Doxygen comments.
+
+The [HowTo guides](doc/HowTo.md) are also available.
+
+## License
+
+BHLib is licensed under [0BSD License](https://opensource.org/license/0bsd).
+This means that you can:
+
+- Use this library in personal or commercial projects
+- Freely redistribute library in either source or binary forms without
+   copyright notice
+- Modify and relicense your version/fork of the library