bufferSize and english

Hey,

I'm using your mETL software quite a bit recently, and I came across the bufferSize param. In test environment, I set it to 100 in order to see things flowing in... 

I also came across some english mistakes, so I push them with if that's ok.

Thanks a bunch for this lib, took me a while to crawl through all the code and figure out how to use it, but now it's all good ;-)

Cheers!