added tests for Casper.viewport()
added tests for Casper.viewport()

sircelsiussexy/casperjs,n1k0/casperjs,jamesanthonyferguson/casperjs,dj31416/casperjs,linkedin/casperjs,ravindrasingh22/casperjs,JZL/casperjs,soundyogi/casperjs,jjyycchh/casperjs,soundyogi/casperjs,cryptoquick/casperjs,singhdev/casperjs,PeterWangPo/casperjs,soundyogi/casperjs,jefleponot/casperjs,cryptoquick/casperjs,muntasir2000/casperjs,cryptoquick/casperjs,jjyycchh/casperjs,n1k0/casperjs,HienLeThi/Casperjs_Demo,jamesanthonyferguson/casperjs,kyroskoh/casperjs,hexid/casperjs,JZL/casperjs,davidwhthomas/casperjs,mickaelandrieu/casperjs,hlr1983/casperjs,casperjs/casperjs,singhdev/casperjs,dj31416/casperjs,n1k0/casperjs,hlr1983/casperjs,vietch2612/casperjs,flyHe/casperjs,RobertoMalatesta/casperjs,mcwonka/casperjs,casperjs/casperjs,sircelsiussexy/casperjs,HienLeThi/Casperjs_Demo,pbrazdil/casperjs,pbrazdil/casperjs,PeterWangPo/casperjs,mcwonka/casperjs,istr/casperjs,pcarrier-packaging/deb-casperjs,jamesanthonyferguson/casperjs,joshuafcole/casperjs,linkedin/casperjs,mcwonka/casperjs,vladikoff/casperjs,davidwhthomas/casperjs,davidwhthomas/casperjs,alexbiehl/casperjs,artillery/casperjs,alexbiehl/casperjs,joshuafcole/casperjs,muntasir2000/casperjs,hudl/casperjs,pcarrier-packaging/deb-casperjs,RobertoMalatesta/casperjs,kyroskoh/casperjs,HienLeThi/Casperjs_Demo,davidwhthomas/casperjs,hexid/casperjs,artillery/casperjs,HienLeThi/Casperjs_Demo,hlr1983/casperjs,mcwonka/casperjs,PeterWangPo/casperjs,jamesanthonyferguson/casperjs,artillery/casperjs,sircelsiussexy/casperjs,mcwonka/casperjs,RobertoMalatesta/casperjs,Andrey-Pavlov/casperjs,mickaelandrieu/casperjs,istr/casperjs,alexbiehl/casperjs,RobertoMalatesta/casperjs,hexid/casperjs,pcarrier-packaging/deb-casperjs,artillery/casperjs,linkedin/casperjs,ravindrasingh22/casperjs,joshuafcole/casperjs,JZL/casperjs,dj31416/casperjs,flyHe/casperjs,hudl/casperjs,hexid/casperjs,vietch2612/casperjs,hexid/casperjs,istr/casperjs,mcwonka/casperjs,soundyogi/casperjs,jefleponot/casperjs,hudl/casperjs,hlr1983/casperjs,n1k0/casperjs,mickaelandrieu/casperjs,jjyycchh/casperjs,jjyycchh/casperjs,Andrey-Pavlov/casperjs,cryptoquick/casperjs,JZL/casperjs,jjyycchh/casperjs,artillery/casperjs,dj31416/casperjs,jefleponot/casperjs,sircelsiussexy/casperjs,pbrazdil/casperjs,PeterWangPo/casperjs,muntasir2000/casperjs,vietch2612/casperjs,kyroskoh/casperjs,HienLeThi/Casperjs_Demo,pcarrier-packaging/deb-casperjs,dj31416/casperjs,muntasir2000/casperjs,soundyogi/casperjs,mickaelandrieu/casperjs,mickaelandrieu/casperjs,muntasir2000/casperjs,casperjs/casperjs,istr/casperjs,jamesanthonyferguson/casperjs,joshuafcole/casperjs,hlr1983/casperjs,davidwhthomas/casperjs,kyroskoh/casperjs,vietch2612/casperjs,singhdev/casperjs,davidwhthomas/casperjs,muntasir2000/casperjs,pbrazdil/casperjs,vietch2612/casperjs,singhdev/casperjs,soundyogi/casperjs,vladikoff/casperjs,ravindrasingh22/casperjs,PeterWangPo/casperjs,kyroskoh/casperjs,cryptoquick/casperjs,Andrey-Pavlov/casperjs,Andrey-Pavlov/casperjs,alexbiehl/casperjs,vladikoff/casperjs,JZL/casperjs,jefleponot/casperjs,flyHe/casperjs,linkedin/casperjs,ravindrasingh22/casperjs,linkedin/casperjs,hudl/casperjs,linkedin/casperjs,dj31416/casperjs,sircelsiussexy/casperjs,pbrazdil/casperjs,alexbiehl/casperjs,vladikoff/casperjs,ravindrasingh22/casperjs,n1k0/casperjs,PeterWangPo/casperjs,alexbiehl/casperjs,vietch2612/casperjs,istr/casperjs,hlr1983/casperjs,sircelsiussexy/casperjs,HienLeThi/Casperjs_Demo,RobertoMalatesta/casperjs,jefleponot/casperjs,vladikoff/casperjs,istr/casperjs,cryptoquick/casperjs,RobertoMalatesta/casperjs,jamesanthonyferguson/casperjs,flyHe/casperjs,kyroskoh/casperjs,artillery/casperjs,casperjs/casperjs,pbrazdil/casperjs,Andrey-Pavlov/casperjs,joshuafcole/casperjs,jjyycchh/casperjs,n1k0/casperjs,casperjs/casperjs,singhdev/casperjs,flyHe/casperjs,casperjs/casperjs,JZL/casperjs,mickaelandrieu/casperjs,ravindrasingh22/casperjs,hexid/casperjs,joshuafcole/casperjs,Andrey-Pavlov/casperjs,hudl/casperjs,jefleponot/casperjs,flyHe/casperjs