Add implementation for ws_value_object_id to string
Move statemachine documentation, was included in wrong header
Do not include source files in documentation
Merge pull request #604 from matthiasbeyer/remove-src_files_from_doc

Do not include source files in documentation
Merge pull request #603 from matthiasbeyer/fix-doc

Move statemachine documentation
Merge pull request #588 from matthiasbeyer/add-objid_tostr

Add implementation for ws_value_object_id to string
Add module for finding GLES2
Add requirement for GLES2 to global CMakeLists.txt
Use GLES2 in utils
Add basic format and query function
Use new format in buffers
Add function for ading the formats
Only allow selected formats for shared memory buffers
Merge pull request #605 from neithernut/add-util-format

Add basic format and query function
Fix result checking.
Fix: Call hotkeys init function.
Rename parameter from "errno" to "errnr"

Actually, "errno" is not possible here.
Make from_raw get a const char*
Make ws_errno_tostr() return const char*
Call ws_errno_tostr() here