Update links to Arch Linux AUR packages in README.

[Freso]

There's now a "stable" whipper package, which is likely the main one we want to link to. I kept in the link to the whipper-git package at the end, but also added a link to the non-git whipper package.

[peaveyman]

When I try to rip with this package I get this error:

Traceback (most recent call last):
File "/usr/bin/whipper", line 11, in
load_entry_point('whipper==0.4.0', 'console_scripts', 'whipper')()
File "/usr/lib/python2.7/site-packages/pkg_resources/init.py", line 561, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources/init.py", line 2631, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources/init.py", line 2291, in load
return self.resolve()
File "/usr/lib/python2.7/site-packages/pkg_resources/init.py", line 2297, in resolve
module = import(self.module_name, fromlist=['name'], level=0)
File "/usr/lib/python2.7/site-packages/morituri/rip/main.py", line 9, in
from morituri.common import log, logcommand, common, config, directory
File "/usr/lib/python2.7/site-packages/morituri/common/log.py", line 27, in
from morituri.extern.log import log as externlog
ImportError: No module named log

[ArchangeGabriel]

@peaveyman Yes, 0.4.0 is not buildable from source. However, 0.4.1 fixes that and @Freso just pushed it to AUR. ;)

[peaveyman]

Now I get this error:
Traceback (most recent call last):
File "/usr/bin/whipper", line 11, in
load_entry_point('whipper==0.4.0', 'console_scripts', 'whipper')()
File "/usr/lib/python2.7/site-packages/morituri/command/main.py", line 39, in main
raise ImportError(e)
ImportError: No module named configure

[peaveyman]

Thanks to the great people on IRC who helped me trouble shoot this and fix the issue. All is working now.

[JoeLametta]

Merged, thanks.