validate project name passed to new_webmachine.sh
validate project name passed to new_webmachine.sh

The project name passed to new_webmachine.sh must be a legal Erlang
atom. If it's not, the resulting errors can be confusing to Erlang
newcomers. Use erl to ensure the name is an atom.

Addresses pull request #65.

asynchrony/webmachine,Cy6erBr4in/webmachine,vinoski/webmachine,b/webmachine,boundary/webmachine,spilgames/webmachine,mkorszun/webmachine,joedevivo/webmachine,mondemand/webmachine,raycmorgan/webmachine,mkorszun/webmachine,campanja/webmachine,raycmorgan/webmachine,mghardy/webmachine,NineFX/webmachine,cmeiklejohn/webmachine,rabbitmq/webmachine,chef/webmachine,tjarvstrand/webmachine,liuhongchao/webmachine,kbrown/webmachine,rabbitmq/webmachine,nparry/webmachine,riak-synrc/webmachine,samuelrivas/webmachine,voila/webmachine,amerisoft/webmachine,sdebnath/webmachine,basho/webmachine,cmeiklejohn/webmachine,zkessin/webmachine,kellymclaughlin/webmachine,sdebnath/webmachine,voila/webmachine,campanja/webmachine,voluntas/webmachine,rabbitmq/webmachine,joedevivo/webmachine,abanca/webmachine,mfoemmel/webmachine,i11/webmachine,anish-mp/webmachine,lemenkov/webmachine,spilgames/webmachine,riak-synrc/webmachine,i11/webmachine,tjarvstrand/webmachine,anish-mp/webmachine,pooya/webmachine,joedevivo/webmachine,mfoemmel/webmachine,asynchrony/webmachine,mghardy/webmachine,neeraj9/webmachine,b/webmachine,pooya/webmachine,djnym/webmachine,kellymclaughlin/webmachine,agx/webmachine,boundary/webmachine,choptastic/webmachine,Webmachine/webmachine,agx/webmachine,vinoski/webmachine,mondemand/webmachine,tipbit/webmachine,voluntas/webmachine,tsloughter/webmachine,lemenkov/webmachine,yfyf/webmachine,kbrown/webmachine,Cy6erBr4in/webmachine,chef/webmachine,tsloughter/webmachine,samuelrivas/webmachine,nparry/webmachine,yfyf/webmachine,srenatus/webmachine,amerisoft/webmachine,neeraj9/webmachine,chaslemley/webmachine,srenatus/webmachine,chaslemley/webmachine,NineFX/webmachine,liuhongchao/webmachine,choptastic/webmachine,riak-synrc/webmachine,basho/webmachine,tigertext/webmachine,abanca/webmachine,Webmachine/webmachine,zkessin/webmachine,tipbit/webmachine,tigertext/webmachine,djnym/webmachine