MetaExtractor stage enhancement

[bejean]

• Check logging consistency (verbose / no verbose)
• Change the action option in testScript class
  "To test the meta extraction with the script tool, you need to use the "-a meta" parameter. Which is kind of weird as the scipt uses action="extractmeta""
  https://groups.google.com/d/msg/crawl-anywhere/9sQBykMmJXE/pcpQYn0IvGMJ
• Allows data to be extracted to contains colon
  https://groups.google.com/forum/#!topic/crawl-anywhere/KetdzBSrAts
• Extracted values are converted to lowercase. Is it a good choice ? Allows disable this.
  https://groups.google.com/forum/#!topic/crawl-anywhere/Re_jlpBpNwc
• Check documentation