tutorial: tweak some titles

doc/index.rst

@@ -3,8 +3,15 @@ servant – A Type-Level Web DSL
 
 .. image:: https://raw.githubusercontent.com/haskell-servant/servant/master/servant.png
 
-Documentation table of contents
+``servant`` is a set of packages for writing web applications and tools around them.
--------------------------------
+It allows to
+
+- write servers,
+- obtain clients (in haskell),
+- generate client functions for other programming languages and
+- generate documentation for your web applications.
+
+All in a type-safe manner.
 
 .. toctree::
   :maxdepth: 2

doc/links.rst

@@ -12,7 +12,7 @@ Helpful Links
   `https://github.com/haskell-servant/servant/issues <https://github.com/haskell-servant/servant/issues>`_
 
 - the irc channel:
-  #servant on freenode
+  ``#servant`` on freenode
 
 - the mailing list:
   `groups.google.com/forum/#!forum/haskell-servant <https://groups.google.com/forum/#!forum/haskell-servant>`_

doc/tutorial/Client.lhs

@@ -1,4 +1,4 @@
-# Deriving Haskell functions to query an API
+# Querying an API
 
 While defining handlers that serve an API has a lot to it, querying an API is simpler: we do not care about what happens inside the webserver, we just need to know how to talk to it and get a response back. Except that we usually have to write the querying functions by hand because the structure of the API isn't a first class citizen and can't be inspected to generate a bunch of client-side functions.
 

doc/tutorial/Docs.lhs

@@ -1,4 +1,4 @@
-# Generating documentation from API types
+# Documenting an API
 
 The source for this tutorial section is a literate haskell file, so first we
 need to have some language extensions and imports:

doc/tutorial/Javascript.lhs

@@ -1,4 +1,4 @@
-# Deriving Javascript functions to query an API
+# Generating Javascript functions to query an API
 
 We will now see how *servant* lets you turn an API type into javascript
 functions that you can call to query a webservice. The derived code assumes you