Units for maxDownloadSize are not defined in docs/comments

[Original-Carl]

https://github.com/yasserg/crawler4j/blob/master/crawler4j/src/main/java/edu/uci/ics/crawler4j/crawler/CrawlConfig.java, Lines 122-126.

A note in the javadoc stating "bytes" or "kilobytes" or whatever would really help. Presently, crawler4J warns me pages are exceeding the maxDownloadSize on pages that appear to be more than 8MB but not on pages with less than 7.5MB.

Just trying to figure this all out. Thanks!