rtd: build fixes

docs/index.rst

@@ -4,7 +4,7 @@
    contain the root `toctree` directive.
 
 Welcome to Tendermint's documentation!
-=====================================
+======================================
 
 Tendermint 101:
 
@@ -36,7 +36,7 @@ Tendermint 201:
    specification
 
 Documentation (to refactor)
--------------
+---------------------------
 
 If you're new here, start with the [Tendermint Intro](/intro).
 

docs/introduction.rst

@@ -0,0 +1,2 @@
+Introduction
+============

docs/specification.rst

@@ -16,6 +16,5 @@ Here you'll details of the Tendermint specification. See `the spec repo <https:/
    merkle.rst
    rpc.rst
    secure-p2p.rst
-   tendermint-types.rst
    validators.rst
    wire-protocol.rst