vec: rename glm_vec_ to glm_vec3_ (continue)

* add missing functions to vec4
* update docs

README.md

@@ -4,7 +4,7 @@
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 The original glm library is for C++ only (templates, namespaces, classes...), this library targeted to C99 but currently you can use it for C89 safely by language extensions e.g `__restrict`
@@ -19,7 +19,7 @@ Complete documentation: http://cglm.readthedocs.io
 - _dup (duplicate) is changed to _copy. For instance `glm_vec_dup -> glm_vec3_copy`
 - OpenGL related functions are dropped to make this lib platform/third-party independent
 - make sure you have latest version and feel free to report bugs, troubles
-- **[bugfix]** euler angles was implemented in reverse order (extrinsic) it was fixed, now they are intrinsic. Make sure that 
+- **[bugfix]** euler angles was implemented in reverse order (extrinsic) it was fixed, now they are intrinsic. Make sure that
 you have the latest version
 - **[major change]** by starting v0.4.0, quaternions are stored as [x, y, z, w], it was [w, x, y, z] in v0.3.5 and earlier versions
 - **[api rename]** by starting v0.4.5, **glm_simd** functions are renamed to **glmm_**