V3.0.0

New features:

• strview_split_all() - split by delimiters into an array of views
• strview_dequote() - remove quotes from a view
• strbuf_to_cstr() - removes strbuf metadata to produce a naked heap allocated string
• strbuf_printf() - now provides format checking

Bug fixes:

• Fixed issue #6 affecting strbuf_append_printf()
• Fixed bug in buffer_vcat(), which would only have consequences if exceeding a buffer size of INT_MAX
• strbuf_read() is supposed to append to a buffer, but wasn't doing that.

Other changes:

• Removed strbuf_register_default_allocator(), now a default allocator may be provided at link time.
• Renamed strbuf_read() to strbuf_append_read()
• Cleaned up & added some examples

• Doxygen friendly.
• Register a default custom allocator.
• Initialise a strbuf_t on creation from a strview_t.
• Additional number conversions with more convenient usage.
• Generic macros for many strbuf.c and strview.c functions which allow using C strings OR strview_t as arguments.
• Some renaming, as delimeters was spelled wrong.
• Simplified allocator.

Created a /docs directory with separate documentation for strbuf.h strview.h strnum.h
Battled with markdown to get the documentation looking respectable.

Now has enough features, testing, and documentation for a release.
Additional features may be added in future releases, but the API will remain backwards compatible from here on.