simplify the readme (#143)

Removes latest versions to ease maintenance

README.md

@@ -21,6 +21,19 @@ iTop also offers mass import tools and web services to integrate with your IT
 - [Data synchronization][18] (for data federation)
 
 
+## Latest release
+
+ - [Changes since the previous version][62]
+ - [New features][63]
+ - [Installation notes][64]
+ - [Download][65]
+
+[62]: https://www.itophub.io/wiki/page?id=latest:release:change_log
+[63]: https://www.itophub.io/wiki/page?id=latest:release:start
+[64]: https://www.itophub.io/wiki/page?id=latest:install:start
+[65]: https://sourceforge.net/projects/itop/files/latest/download
+
+
 ## Resources
 
  - [iTop Forums][1]: community support
@@ -31,7 +44,6 @@ iTop also offers mass import tools and web services to integrate with your IT
  - [iTop Hub][6] : discover and install extensions !
 
 
-
 [1]: https://sourceforge.net/p/itop/discussion/
 [2]: https://sourceforge.net/p/itop/tickets/
 [3]: https://sourceforge.net/projects/itop/files/itop/
@@ -51,47 +63,6 @@ iTop also offers mass import tools and web services to integrate with your IT
 
 
 
-## Last releases
-
-### Versions 2.7.*
- - 2.7.1 published on April 8, 2020
- - [Changes since the previous version][62]
- - [New features][63]
- - [Migration notes][64]
- - [Download iTop 2.7.0-2][65]
-
-[62]: https://www.itophub.io/wiki/page?id=2_7_0:release:change_log
-[63]: https://www.itophub.io/wiki/page?id=2_7_0:release:2_7_whats_new
-[64]: https://www.itophub.io/wiki/page?id=2_7_0:install:260_to_270_migration_notes
-[65]: https://sourceforge.net/projects/itop/files/itop/2.7.0-2
-
-
-### Versions 2.6.*
- - 2.6.0 published on January 9, 2019
- - [Changes since the previous version][58]
- - [New features][59]
- - [Migration notes][60]
- - [Download iTop 2.6.3][61]
-
-[58]: https://www.itophub.io/wiki/page?id=2_6_0:release:change_log
-[59]: https://www.itophub.io/wiki/page?id=2_6_0:release:2_6_whats_new
-[60]: https://www.itophub.io/wiki/page?id=2_6_0:install:250_to_260_migration_notes
-[61]: https://sourceforge.net/projects/itop/files/itop/2.6.3
-
-
-### Versions 2.5.*
- - 2.5.0 published on July 11, 2018
- - [Changes since the previous version][54]
- - [New features][55]
- - [Migration notes][56]
- - [Download iTop 2.5.1][57]
-
-[54]: https://www.itophub.io/wiki/page?id=2_5_0:release:change_log
-[55]: https://www.itophub.io/wiki/page?id=2_5_0:release:2_5_whats_new
-[56]: https://www.itophub.io/wiki/page?id=2_5_0:install:240_to_250_migration_notes
-[57]: https://sourceforge.net/projects/itop/files/itop/2.5.1
-
-
 ## About Us
 
 iTop development is sponsored, led and supported by [Combodo][0].