Make filter regex more inclusive
Make filter regex more inclusive

so that it filters out more "no previously-included..." warnings from
distutils while installing.

Before:

    $ pip install -e ~/dev/git-repos/pip
    Obtaining file:///Users/marca/dev/git-repos/pip
        warning: no previously-included files found matching '.coveragerc'
        warning: no previously-included files found matching '.mailmap'
        warning: no previously-included files found matching '.travis.yml'
        warning: no previously-included files found matching 'pip/_vendor/Makefile'
        warning: no previously-included files found matching 'tox.ini'
        no previously-included directories found matching '.travis'
        no previously-included directories found matching 'docs/_build'
        no previously-included directories found matching 'contrib'
        no previously-included directories found matching 'tasks'
        no previously-included directories found matching 'tests'
    Installing collected packages: pip
      Running setup.py develop for pip
        warning: no previously-included files found matching '.coveragerc'
        warning: no previously-included files found matching '.mailmap'
        warning: no previously-included files found matching '.travis.yml'
        warning: no previously-included files found matching 'pip/_vendor/Makefile'
        warning: no previously-included files found matching 'tox.ini'
        no previously-included directories found matching '.travis'
        no previously-included directories found matching 'docs/_build'
        no previously-included directories found matching 'contrib'
        no previously-included directories found matching 'tasks'
        no previously-included directories found matching 'tests'
    ...

After:

    $ pip install -e ~/dev/git-repos/pip
    Obtaining file:///Users/marca/dev/git-repos/pip
    Installing collected packages: pip
      Running setup.py develop for pip
    ...

ianw/pip,James-Firth/pip,caosmo/pip,alex/pip,Gabriel439/pip,pfmoore/pip,tdsmith/pip,alex/pip,pjdelport/pip,pypa/pip,RonnyPfannschmidt/pip,RonnyPfannschmidt/pip,squidsoup/pip,squidsoup/pip,xavfernandez/pip,sigmavirus24/pip,pypa/pip,pradyunsg/pip,techtonik/pip,graingert/pip,prasaianooz/pip,luzfcb/pip,ChristopherHogan/pip,harrisonfeng/pip,prasaianooz/pip,habnabit/pip,dstufft/pip,habnabit/pip,techtonik/pip,zenlambda/pip,mujiansu/pip,msabramo/pip,jamezpolley/pip,haridsv/pip,KarelJakubec/pip,sigmavirus24/pip,caosmo/pip,rbtcollins/pip,jythontools/pip,esc/pip,yati-sagade/pip,wkeyword/pip,harrisonfeng/pip,benesch/pip,fiber-space/pip,squidsoup/pip,natefoo/pip,pfmoore/pip,rbtcollins/pip,luzfcb/pip,James-Firth/pip,pradyunsg/pip,zvezdan/pip,ianw/pip,wkeyword/pip,alex/pip,jmagnusson/pip,James-Firth/pip,jythontools/pip,mindw/pip,xavfernandez/pip,jmagnusson/pip,caosmo/pip,rbtcollins/pip,natefoo/pip,atdaemon/pip,msabramo/pip,rouge8/pip,KarelJakubec/pip,davidovich/pip,qbdsoft/pip,mujiansu/pip,fiber-space/pip,pjdelport/pip,h4ck3rm1k3/pip,rouge8/pip,KarelJakubec/pip,techtonik/pip,atdaemon/pip,blarghmatey/pip,davidovich/pip,graingert/pip,Gabriel439/pip,haridsv/pip,benesch/pip,mindw/pip,ncoghlan/pip,jasonkying/pip,supriyantomaftuh/pip,zenlambda/pip,prasaianooz/pip,mujiansu/pip,ChristopherHogan/pip,zorosteven/pip,willingc/pip,patricklaw/pip,jmagnusson/pip,chaoallsome/pip,Gabriel439/pip,davidovich/pip,yati-sagade/pip,patricklaw/pip,zenlambda/pip,jasonkying/pip,habnabit/pip,sigmavirus24/pip,h4ck3rm1k3/pip,zvezdan/pip,atdaemon/pip,zvezdan/pip,esc/pip,jythontools/pip,qbdsoft/pip,tdsmith/pip,luzfcb/pip,graingert/pip,sbidoul/pip,erikrose/pip,erikrose/pip,nthall/pip,ncoghlan/pip,benesch/pip,ChristopherHogan/pip,fiber-space/pip,haridsv/pip,h4ck3rm1k3/pip,natefoo/pip,sbidoul/pip,supriyantomaftuh/pip,qbdsoft/pip,supriyantomaftuh/pip,dstufft/pip,blarghmatey/pip,nthall/pip,ncoghlan/pip,pjdelport/pip,xavfernandez/pip,jamezpolley/pip,harrisonfeng/pip,esc/pip,nthall/pip,RonnyPfannschmidt/pip,rouge8/pip,wkeyword/pip,zorosteven/pip,willingc/pip,chaoallsome/pip,tdsmith/pip,yati-sagade/pip,jamezpolley/pip,dstufft/pip,erikrose/pip,mindw/pip,willingc/pip,jasonkying/pip,zorosteven/pip,chaoallsome/pip,blarghmatey/pip