Readme: use absolute path for links

[fedelibre]

In the README these commands are suggested:

$ ln -s gedit-sessionsaver/sessionsaver ~/.local/share/gedit/plugins/
$ ln -s gedit-sessionsaver/sessionsaver.plugin ~/.local/share/gedit/plugins/

However I managed to make it work only when I used a full path:

$ ln -s ~/path/to/gedit-sessionsaver/sessionsaver ~/.local/share/gedit/plugins/
$ ln -s ~/path/to/gedit-sessionsaver/sessionsaver.plugin ~/.local/share/gedit/plugins/

[blackjackshellac]

The "copy" installation method is also incomplete, should specify -a to copy the sessionsaver directory recursively,

cp -av gedit-sessionsaver/sessionsaver ~/.local/share/gedit/plugins/
cp -av gedit-sessionsaver/sessionsaver.plugin ~/.local/share/gedit/plugins/

[fedelibre]

it seems that this plugin is not maintained.. I tried it again and it does not work
I've switched to gedit-restore-tabs