refs #717 - fixed typo in readme
refs #717 - fixed typo in readme

correct misspelled 'bootsrap' to 'bootstrap'
Fix #717
jamesanthonyferguson/casperjs,jefleponot/casperjs,istr/casperjs,muntasir2000/casperjs,artillery/casperjs,artillery/casperjs,hlr1983/casperjs,muntasir2000/casperjs,RobertoMalatesta/casperjs,ravindrasingh22/casperjs,JZL/casperjs,dj31416/casperjs,Andrey-Pavlov/casperjs,davidwhthomas/casperjs,kyroskoh/casperjs,RobertoMalatesta/casperjs,jefleponot/casperjs,JZL/casperjs,PeterWangPo/casperjs,joshuafcole/casperjs,HienLeThi/Casperjs_Demo,pbrazdil/casperjs,artillery/casperjs,vietch2612/casperjs,kyroskoh/casperjs,linkedin/casperjs,hexid/casperjs,soundyogi/casperjs,mcwonka/casperjs,RobertoMalatesta/casperjs,ravindrasingh22/casperjs,cryptoquick/casperjs,casperjs/casperjs,jjyycchh/casperjs,hlr1983/casperjs,jamesanthonyferguson/casperjs,casperjs/casperjs,mickaelandrieu/casperjs,jjyycchh/casperjs,jamesanthonyferguson/casperjs,vietch2612/casperjs,soundyogi/casperjs,Andrey-Pavlov/casperjs,PeterWangPo/casperjs,flyHe/casperjs,singhdev/casperjs,n1k0/casperjs,linkedin/casperjs,hlr1983/casperjs,PeterWangPo/casperjs,vietch2612/casperjs,flyHe/casperjs,muntasir2000/casperjs,sircelsiussexy/casperjs,hexid/casperjs,hudl/casperjs,kyroskoh/casperjs,cryptoquick/casperjs,davidwhthomas/casperjs,hudl/casperjs,HienLeThi/Casperjs_Demo,hudl/casperjs,pbrazdil/casperjs,vietch2612/casperjs,mickaelandrieu/casperjs,sircelsiussexy/casperjs,linkedin/casperjs,n1k0/casperjs,hexid/casperjs,jefleponot/casperjs,mcwonka/casperjs,JZL/casperjs,sircelsiussexy/casperjs,muntasir2000/casperjs,mickaelandrieu/casperjs,dj31416/casperjs,n1k0/casperjs,alexbiehl/casperjs,jjyycchh/casperjs,HienLeThi/Casperjs_Demo,istr/casperjs,JZL/casperjs,sircelsiussexy/casperjs,davidwhthomas/casperjs,kyroskoh/casperjs,hlr1983/casperjs,joshuafcole/casperjs,HienLeThi/Casperjs_Demo,dj31416/casperjs,dj31416/casperjs,linkedin/casperjs,PeterWangPo/casperjs,flyHe/casperjs,cryptoquick/casperjs,istr/casperjs,istr/casperjs,Andrey-Pavlov/casperjs,n1k0/casperjs,Andrey-Pavlov/casperjs,istr/casperjs,ravindrasingh22/casperjs,jjyycchh/casperjs,pbrazdil/casperjs,dj31416/casperjs,vietch2612/casperjs,RobertoMalatesta/casperjs,davidwhthomas/casperjs,sircelsiussexy/casperjs,kyroskoh/casperjs,cryptoquick/casperjs,mcwonka/casperjs,flyHe/casperjs,linkedin/casperjs,vietch2612/casperjs,muntasir2000/casperjs,casperjs/casperjs,joshuafcole/casperjs,HienLeThi/Casperjs_Demo,singhdev/casperjs,mcwonka/casperjs,jjyycchh/casperjs,ravindrasingh22/casperjs,JZL/casperjs,ravindrasingh22/casperjs,alexbiehl/casperjs,flyHe/casperjs,casperjs/casperjs,mcwonka/casperjs,joshuafcole/casperjs,mickaelandrieu/casperjs,soundyogi/casperjs,davidwhthomas/casperjs,davidwhthomas/casperjs,artillery/casperjs,Andrey-Pavlov/casperjs,jamesanthonyferguson/casperjs,HienLeThi/Casperjs_Demo,singhdev/casperjs,jamesanthonyferguson/casperjs,PeterWangPo/casperjs,joshuafcole/casperjs,Andrey-Pavlov/casperjs,alexbiehl/casperjs,hlr1983/casperjs,mickaelandrieu/casperjs,pbrazdil/casperjs,singhdev/casperjs,hexid/casperjs,RobertoMalatesta/casperjs,jamesanthonyferguson/casperjs,flyHe/casperjs,joshuafcole/casperjs,muntasir2000/casperjs,hexid/casperjs,jefleponot/casperjs,kyroskoh/casperjs,soundyogi/casperjs,dj31416/casperjs,cryptoquick/casperjs,artillery/casperjs,casperjs/casperjs,mcwonka/casperjs,hudl/casperjs,artillery/casperjs,pbrazdil/casperjs,RobertoMalatesta/casperjs,alexbiehl/casperjs,ravindrasingh22/casperjs,hexid/casperjs,n1k0/casperjs,PeterWangPo/casperjs,hudl/casperjs,cryptoquick/casperjs,sircelsiussexy/casperjs,casperjs/casperjs,istr/casperjs,alexbiehl/casperjs,hlr1983/casperjs,jefleponot/casperjs,singhdev/casperjs,alexbiehl/casperjs,mickaelandrieu/casperjs,soundyogi/casperjs,pbrazdil/casperjs,n1k0/casperjs,jefleponot/casperjs,jjyycchh/casperjs,JZL/casperjs,linkedin/casperjs,soundyogi/casperjs