Merge pull request #6172 from RyDroid/readme

Minor changes to README file

README.md

 # diaspora* 
-### a privacy-aware, distributed, open source social network
+### A privacy-aware, distributed, open source social network
 
 **master:** [![Build Status master](https://secure.travis-ci.org/diaspora/diaspora.png?branch=master)](http://travis-ci.org/diaspora/diaspora)
 **stable:** [![Build Status stable](https://secure.travis-ci.org/diaspora/diaspora.png?branch=stable)](http://travis-ci.org/diaspora/diaspora) |
@@ -9,7 +9,7 @@
 
 [Project site](https://diasporafoundation.org) |
 [Wiki](https://wiki.diasporafoundation.org) |
-[Bugtracker](http://github.com/diaspora/diaspora/issues) |
+[Bugtracker](https://github.com/diaspora/diaspora/issues) |
 [Discussions](https://www.loomio.org/groups/194) |
 [Mailing lists](https://wiki.diasporafoundation.org/How_We_Communicate#Mailing_Lists) |
 [License](/COPYRIGHT) |
@@ -17,7 +17,6 @@
 
 ## Installation
 
-
 You don't have to install diaspora* to use the network. There are many servers connected to diaspora*s network which are open to anyone, and you can create an account on one of these servers. Have a look at our [tips for finding a home](https://wiki.diasporafoundation.org/Choosing_a_pod), or you can just go straight to the [list of open servers](http://podupti.me) to sign up.
 
 Want to own your data and install diaspora*? Whether you just want to try it out, want to install it on your server or want to contribute and need a development setup, our [installation guides](https://wiki.diasporafoundation.org/Installation) will get you started!
@@ -34,5 +33,4 @@ To keep diaspora*  growing and improving we need all help we can get. Whether yo
 
 ## Security
 
-Found a security issue? Please disclose it responsibly. We have a team of developers listening to [security@diasporafoundation.org](mailto:security@diasporafoundation.org). The PGP fingerprint is [AB0D AB02 0FC5 D398 03AB 3CE1 6F70 243F 27AD 886A](http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x6F70243F27AD886A)
-
+Found a security issue? Please disclose it responsibly. We have a team of developers listening to [security@diasporafoundation.org](mailto:security@diasporafoundation.org). The PGP fingerprint is [AB0D AB02 0FC5 D398 03AB 3CE1 6F70 243F 27AD 886A](https://pgp.mit.edu/pks/lookup?op=get&search=0x6F70243F27AD886A).