auto merge of #18613 : steveklabnik/rust/ownership_guide, r=huonw

This is a work in progress, but this should get *extensive* review, so I'm putting it up early and often.

This is the start of a draft of the new 'ownership guide,' which explains ownership, borrowing, etc. I'm feeling better about this framing than last time's, but we'll see.

Author: bors

configure

@@ -1044,7 +1044,7 @@ do
     make_dir $h/test/doc-guide-ffi
     make_dir $h/test/doc-guide-runtime
     make_dir $h/test/doc-guide-macros
-    make_dir $h/test/doc-guide-lifetimes
+    make_dir $h/test/doc-guide-ownership
     make_dir $h/test/doc-guide-pointers
     make_dir $h/test/doc-guide-container
     make_dir $h/test/doc-guide-tasks

mk/docs.mk

@@ -25,7 +25,7 @@
 # L10N_LANGS are the languages for which the docs have been
 # translated.
 ######################################################################
-DOCS := index intro tutorial guide guide-ffi guide-macros guide-lifetimes \
+DOCS := index intro tutorial guide guide-ffi guide-macros guide-ownership \
 	guide-tasks guide-container guide-pointers guide-testing \
 	guide-plugin guide-crates complement-bugreport guide-error-handling \
 	complement-lang-faq complement-design-faq complement-project-faq \