Fix incorrect port of standard Python server

/ht @zpao

(cherry picked from commit 6f2848f4a6027daf9ba77e2f7f62a563fd96cf1a)
update dead jsx link to point to an extant page

syntax.html no longer exists, so point people at the in depth article instead.
(cherry picked from commit 8f55d94d407a445a6f27d007f20421210757d6b8)
put closing paren in correct place
(cherry picked from commit 07427ae9d029a8af89451c43dab65b61c20904ed)
remove dead link

the event handling doc page no longer exists
(cherry picked from commit 4ab62a6bd2b38464e129ad95360d9de75c8133b5)
Updated Changelog for 0.4.1

(cherry picked from commit a1f5c1dee7d6f202d8656a2af56dd8b3cdf53793)
Blog post for v0.4.1

(cherry picked from commit 27a1729f6d7e12e291b0643b60af5ccfa38c23c6)
Updated Readme for 0.4.1

(cherry picked from commit c347b720a9ee6009103174cf0ededca6aab070d9)
react-rails blog post

(cherry picked from commit dc06704ec7163d37b60b6ec8796bb01cf476a51c)