Version 0.4

• polished up the interface, many breaking changes in the form of renaming and new header files
• added unified error handling facilities and handler functions in case exceptions are not supported
• improved old allocator adapters by introducing allocator_storage template
• improved allocator_traits making them more powerful and able to handle Allcoator types directly
• added type-erased allocator storage
• added node-size debugger that obtains information about the container node sizes
• most parts now work on a freestanding implementation
• used foonathan/compatibility for CMake compatibility checks
• added miscellaneous tiny features all over the place
• many internal changes and bugfixes