Remove manual gem installation instructions
Remove manual gem installation instructions

please use bundler in 2013
flywithmemsl/sinatra-assetpack,jwhitcraft/sinatra-assetpack,jwhitcraft/sinatra-assetpack,jwhitcraft/sinatra-assetpack,flywithmemsl/sinatra-assetpack,flywithmemsl/sinatra-assetpack,rstacruz/sinatra-assetpack,rstacruz/sinatra-assetpack,rstacruz/sinatra-assetpack