preserve query string when toggling between regular and log.txt matrix
new script: create-folded-distname-list.pl

Creates a sorted file with CPAN distnames, usable for Search::Dict,
for example.
new modules/scripts for suggest service and dynamic opensearch.xml

Both modules may be used as Plack apps and as CGIs.
psgi/cgi configurations for suggest service and dynamic opensearch.xml

Also, the psgi change adds a "srt"-compatible AccessLog format,
including subsecond logging.
add suggest url for static opensearch.xml
tests for CPAN::Testers::Matrix::{Suggest,Opensearch}
warning fix if -o is not used
oo-ified CPAN::Testers::Matrix::Suggest

And now suggest.t is created the folded distname list, and uses this
one for testing.
travis testing: use ~/.cpan instead of /tmp/.cpan
warning fix