Now can over-ride the output path.

crank looks at the PERL101_OUT_PATH environment variable which can be
used to instruct it to output to somewhere else.
Corrected a typo.
Merge remote branch 'remotes/petdance/master'

Conflicts:
	crank
Merge branch 'master' of https://github.com/petdance/perl101

Conflicts:
	crank
Referenced Devel::NYTProf and added links.
Merge pull request #5 from shlomif/master

Add NYTProf and add some hyperlinks.