README.md: some further small improvements

- fix header alignments, there were first and third level, but no
  second level headers
- "do not despair and try to build it yourself" might be mistaken
  for a discouragement to build the software from scratch

README.md

@@ -1,20 +1,20 @@
 # FreeLAN
 
-### What is FreeLAN?
+## What is FreeLAN?
 
 A peer-to-peer, secure, easy-to-setup, multi-platform, open-source,
 highly-configurable VPN software.
 
-### Installation
+## Installation
 
 FreeLAN is available on Windows, Mac OSX and Linux (Debian-based distributions).
 Check the [official website](http://www.freelan.org) for installers.
 
-If your platform is not officially supported, dot not despair and try to
-build-it yourself ! Check the [build instructions](BUILD.md) for details on how
+If your platform is not officially supported, do not despair and just try to
+build it yourself ! Check the [build instructions](BUILD.md) for details on how
 to do that.
 
-### Quick-start
+## Quick-start
 
 FreeLAN can be configured to support any network topology, be it a traditional
 client-server structure or a full-mesh one. The emulated network can operate at
@@ -42,29 +42,29 @@ so:
 Check out the [configuration file](apps/freelan/config/freelan.cfg) for details
 !
 
-### Frequently Asked Questions
+## Frequently Asked Questions
 
-#### Is there a graphical interface ?
+### Is there a graphical interface ?
 
 A graphical user interface is planned but nothing is made public yet. You will
 just have to be patient :)
 
-#### Can I use FreeLAN to access forbidden websites/websites in other countries with restrictions ?
+### Can I use FreeLAN to access forbidden websites/websites in other countries with restrictions ?
 
 FreeLAN is not a service, it's a software. You can configure it to reach that
 goal easily, but you'll need an exit-point (a server, a friendly-computer at the
     right location) on which you can run FreeLAN too. **It will always take a
 minimum of 2 nodes to create a VPN network**.
 
-### Donations
+## Donations
 
 You like FreeLAN and you would like to show your support and help development of
 next releases ? Check out the [donate page](http://freelan.org/donate.html#) !
 
-### Contributions
+## Contributions
 
 Check the [contributions guidelines](CONTRIBUTING.md).
 
-### Packaging
+## Packaging
 
 Check the [packaging instructions](packaging/README.md).