Interestingly, I tried testing Everpad in a live boot and still had the same issue. The latest repositories just do not like the PySide module. A little research suggests its to do with latest 'sqlalchemy' version I believe (could be wrong there so don't quote me on that).
I have managed to move it passed the PySide error. I now get it stuck here:
$ everpad
Traceback (most recent call last):
File "/usr/bin/everpad", line 9, in <module>
load_entry_point('everpad==2.6.1dev', 'gui_scripts', 'everpad')()
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 353, in load_entry_point
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2321, in load_entry_point
return ep_map
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2048, in load
if req.specs: raise ValueError
File "/usr/lib/pymodules/python2.7/everpad/pad/indicator.py", line 8, in <module>
from everpad.pad.editor import Editor
File "/usr/lib/pymodules/python2.7/everpad/pad/editor/__init__.py", line 6, in <module>
from everpad.interface.editor import Ui_Editor
File "/usr/lib/pymodules/python2.7/everpad/interface/editor.py", line 125, in <module>
from PySide import QtWebKit
ImportError: cannot import name QtWebKit
I have found the below link which managed to get me this. It took me a little longer for me to get this far because I had a few other problems along the way, but it may work for you:
https://github.com/nvbn/everpad/issues/401
Looks like the issue is with the PySide install not having the .egg-info. Apparently something to do with the way apt-get installs python-pyside. However it doesn't seem to install the PySide.QTWebKit module correctly.
The link above pretty much just suggests installing PySide via pip install pyside but I seem to have problems directly with importing QTWebKit from the PySide module in the python interpreter. I'll update this post if I manage to get passed this QTWebKit issue.