Update REAME.rst
Update REAME.rst

- simplify a bit since we have the web site now. We don't use
  README.rst for index.html anymore.
- rewrite 'What's Ryu' section so that it can be used for RPM package
  description.

Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

ynkjm/ryu,openvapour/ryu,hisaharu/ryu,shinpeimuraoka/ryu,TakeshiTseng/ryu,StephenKing/summerschool-2015-ryu,sivaramakrishnansr/ryu,citrix-openstack/build-ryu,jazzmes/ryu,jkoelker/ryu,mikhaelharswanto/ryu,lsqtongxin/ryu,Tesi-Luca-Davide/ryu,ynkjm/ryu,gopchandani/ryu,ynkjm/ryu,diogommartins/ryu,gopchandani/ryu,ntts-clo/ryu,John-Lin/ryu,lzppp/mylearning,iwaseyusuke/ryu,osrg/ryu,zangree/ryu,habibiefaried/ryu,lagopus/ryu-lagopus-ext,alanquillin/ryu,unifycore/ryu,shinpeimuraoka/ryu,ysywh/ryu,ttsubo/ryu,fkakuma/ryu,gareging/SDN_Framework,alyosha1879/ryu,castroflavio/ryu,osrg/ryu,yamt/ryu,fkakuma/ryu,Tejas-Subramanya/RYU_MEC,lsqtongxin/ryu,muzixing/ryu,evanscottgray/ryu,ykaneko/ryu,ttsubo/ryu,openvapour/ryu,mikhaelharswanto/ryu,zyq001/ryu,torufuru/oolhackathon,fujita/ryu,lzppp/mylearning,hisaharu/ryu,darjus-amzn/ryu,fkakuma/ryu,torufuru/oolhackathon,haniehrajabi/ryu,elahejalalpour/ELRyu,gopchandani/ryu,jkoelker/ryu,osrg/ryu,takahashiminoru/ryu,elahejalalpour/ELRyu,fujita/ryu,alyosha1879/ryu,osrg/ryu,OpenState-SDN/ryu,gareging/SDN_Framework,alyosha1879/ryu,gareging/SDN_Framework,ysywh/ryu,evanscottgray/ryu,yamt/ryu,castroflavio/ryu,yamada-h/ryu,lsqtongxin/ryu,yamada-h/ryu,evanscottgray/ryu,habibiefaried/ryu,zyq001/ryu,umkcdcrg01/ryu_openflow,sivaramakrishnansr/ryu,ntts-clo/ryu,yamt/ryu,openvapour/ryu,John-Lin/ryu,TakeshiTseng/ryu,muzixing/ryu,lagopus/ryu-lagopus-ext,Zouyiran/ryu,John-Lin/ryu,Zouyiran/ryu,muzixing/ryu,zangree/ryu,ntts-clo/mld-ryu,fkakuma/ryu,zyq001/ryu,fujita/ryu,jalilm/ryu,darjus-amzn/ryu,Tesi-Luca-Davide/ryu,gareging/SDN_Framework,sivaramakrishnansr/ryu,lsqtongxin/ryu,lsqtongxin/ryu,unifycore/ryu,gopchandani/ryu,castroflavio/ryu,sivaramakrishnansr/ryu,diogommartins/ryu,torufuru/OFPatchPanel,jalilm/ryu,iwaseyusuke/ryu,umkcdcrg01/ryu_openflow,haniehrajabi/ryu,ttsubo/ryu,lagopus/ryu-lagopus-ext,habibiefaried/ryu,jkoelker/ryu,TakeshiTseng/ryu,lagopus/ryu-lagopus-ext,darjus-amzn/ryu,zyq001/ryu,hisaharu/ryu,alanquillin/ryu,TakeshiTseng/ryu,muzixing/ryu,haniehrajabi/ryu,OpenState-SDN/ryu,alanquillin/ryu,ynkjm/ryu,hisaharu/ryu,o3project/ryu-oe,StephenKing/summerschool-2015-ryu,jazzmes/ryu,Zouyiran/ryu,haniehrajabi/ryu,zangree/ryu,ynkjm/ryu,pichuang/ryu,John-Lin/ryu,citrix-openstack-build/ryu,zangree/ryu,elahejalalpour/ELRyu,OpenState-SDN/ryu,takahashiminoru/ryu,sivaramakrishnansr/ryu,alanquillin/ryu,gopchandani/ryu,StephenKing/ryu,torufuru/oolhackathon,muzixing/ryu,diogommartins/ryu,ttsubo/ryu,ysywh/ryu,pichuang/ryu,yamt/ryu,torufuru/OFPatchPanel,diogommartins/ryu,lzppp/mylearning,umkcdcrg01/ryu_openflow,iwaseyusuke/ryu,hisaharu/ryu,samrussell/ryu,lzppp/mylearning,Tejas-Subramanya/RYU_MEC,samrussell/ryu,StephenKing/summerschool-2015-ryu,ysywh/ryu,Tesi-Luca-Davide/ryu,openvapour/ryu,shinpeimuraoka/ryu,takahashiminoru/ryu,umkcdcrg01/ryu_openflow,elahejalalpour/ELRyu,Tejas-Subramanya/RYU_MEC,umkcdcrg01/ryu_openflow,John-Lin/ryu,darjus-amzn/ryu,jalilm/ryu,TakeshiTseng/ryu,fujita/ryu,alanquillin/ryu,citrix-openstack/build-ryu,ysywh/ryu,elahejalalpour/ELRyu,habibiefaried/ryu,zyq001/ryu,takahashiminoru/ryu,zangree/ryu,Tesi-Luca-Davide/ryu,ttsubo/ryu,Tesi-Luca-Davide/ryu,o3project/ryu-oe,iwaseyusuke/ryu,shinpeimuraoka/ryu,StephenKing/ryu,lagopus/ryu-lagopus-ext,pichuang/ryu,gareging/SDN_Framework,citrix-openstack-build/ryu,fujita/ryu,diogommartins/ryu,darjus-amzn/ryu,Tejas-Subramanya/RYU_MEC,iwaseyusuke/ryu,OpenState-SDN/ryu,jalilm/ryu,osrg/ryu,habibiefaried/ryu,yamt/ryu,alyosha1879/ryu,Zouyiran/ryu,OpenState-SDN/ryu,openvapour/ryu,shinpeimuraoka/ryu,Zouyiran/ryu,lzppp/mylearning,takahashiminoru/ryu,Tejas-Subramanya/RYU_MEC,StephenKing/ryu,fkakuma/ryu,pichuang/ryu,jazzmes/ryu,jalilm/ryu,StephenKing/summerschool-2015-ryu,StephenKing/ryu,ntts-clo/mld-ryu,pichuang/ryu,haniehrajabi/ryu,StephenKing/ryu,ykaneko/ryu,StephenKing/summerschool-2015-ryu