Log captured events

[lezsakdomi]

Print an informational message, when something is captured. It should be at verbosity level 3

[lezsakdomi]

Or, I've got an idea:

There should be three output: stdout, stderr, file.

• The textual output goes to stdout, similar to the end of the mhtmls.
• On the stderr should be all error and verbose messages.
• In the file goes the regular HTML capture

Example invocation:

xsr capture.html >capture.txt