ENH: testing: load available nose plugins that are external to nose itself
ENH: testing: load available nose plugins that are external to nose itself

Motivation is to be able to use `nose-timer` within the test() function.
Try (after installing nose-timer):

    np.test(extra_argv=['--with-timer', '--timer-top-n', '20'])

mhvk/numpy,ahaldane/numpy,MSeifert04/numpy,madphysicist/numpy,seberg/numpy,bringingheavendown/numpy,ahaldane/numpy,WarrenWeckesser/numpy,tynn/numpy,grlee77/numpy,madphysicist/numpy,ahaldane/numpy,abalkin/numpy,shoyer/numpy,endolith/numpy,simongibbons/numpy,jorisvandenbossche/numpy,shoyer/numpy,rgommers/numpy,solarjoe/numpy,simongibbons/numpy,mhvk/numpy,shoyer/numpy,pbrod/numpy,pdebuyl/numpy,b-carter/numpy,grlee77/numpy,abalkin/numpy,numpy/numpy,mhvk/numpy,jorisvandenbossche/numpy,endolith/numpy,charris/numpy,charris/numpy,pizzathief/numpy,ahaldane/numpy,simongibbons/numpy,mhvk/numpy,pdebuyl/numpy,shoyer/numpy,endolith/numpy,rgommers/numpy,jakirkham/numpy,madphysicist/numpy,mattip/numpy,pizzathief/numpy,jorisvandenbossche/numpy,MSeifert04/numpy,pizzathief/numpy,numpy/numpy,madphysicist/numpy,mattip/numpy,grlee77/numpy,pdebuyl/numpy,WarrenWeckesser/numpy,seberg/numpy,grlee77/numpy,simongibbons/numpy,madphysicist/numpy,pbrod/numpy,gfyoung/numpy,pizzathief/numpy,MSeifert04/numpy,solarjoe/numpy,b-carter/numpy,Eric89GXL/numpy,WarrenWeckesser/numpy,gfyoung/numpy,jorisvandenbossche/numpy,jakirkham/numpy,anntzer/numpy,seberg/numpy,charris/numpy,tynn/numpy,grlee77/numpy,numpy/numpy,pbrod/numpy,anntzer/numpy,b-carter/numpy,mattip/numpy,jakirkham/numpy,WarrenWeckesser/numpy,Eric89GXL/numpy,jakirkham/numpy,abalkin/numpy,mhvk/numpy,pbrod/numpy,anntzer/numpy,Eric89GXL/numpy,charris/numpy,rgommers/numpy,pizzathief/numpy,ahaldane/numpy,gfyoung/numpy,tynn/numpy,bringingheavendown/numpy,anntzer/numpy,bringingheavendown/numpy,jorisvandenbossche/numpy,simongibbons/numpy,pbrod/numpy,shoyer/numpy,seberg/numpy,solarjoe/numpy,jakirkham/numpy,mattip/numpy,Eric89GXL/numpy,MSeifert04/numpy,numpy/numpy,endolith/numpy,rgommers/numpy,pdebuyl/numpy,MSeifert04/numpy,WarrenWeckesser/numpy