docs: building cglm

docs/source/build.rst

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+Building cglm
+================================
+
+| **cglm** does not have external dependencies except for unit testing.
+| When you pulled cglm repo with submodules all dependencies will be pulled too.
+| `build-deps.sh` will pull all dependencies/submodules and build for you.
+
+External dependencies:
+  * cmocka - for unit testing
+
+**NOTE:**
+If you only need to inline versions, you don't need to build **cglm**, you don't need to link it to your program.
+Just import cglm to your project as dependency / external lib by copy-paste then use it as usual
+
+**Unix (Autotools):**
+
+.. code-block:: bash
+  :linenos:
+
+  $ sh ./build-deps.sh    # run this only once (dependencies)
+
+  $ sh autogen.sh
+  $ ./configure
+  $ make
+  $ make check            # run tests (optional)
+  $ [sudo] make install   # install to system (optional)
+
+**make** will build cglm to **.libs** sub folder in project folder.
+If you don't want to install cglm to your system's folder you can get static and dynamic libs in this folder.
+
+**Build dependencies (windows):**
+
+Windows related build files, project files are located in win folder,
+make sure you are inside in cglm/win folder.
+
+Code Analysis are enabled, it may take awhile to build.
+
+.. code-block:: bash
+  :linenos:
+
+  $ cd win
+  $ .\build.bat
+
+if *msbuild* is not worked (because of multi versions of Visual Studio)
+then try to build with *devenv*:
+
+.. code-block:: bash
+  :linenos:
+
+  $ devenv cglm.sln /Build Release
+
+Currently tests are not available on Windows.