try to re-throw any primer3 run errors with PRIMER_ERROR output from log file
add new exception class for primer3 run fail
create hash of primer3 config defaults and use this to setup default values for attributes
make attributes lazy
fixed failing test for find-gibson-oligos command, make a better fail to find primers test by using a region slice with just N characters
ignore complex regex perlcritic complaint
add test to Util::Primer3 to check for new error thrown if primer3 fails to run
add tests for setting up primer3 default parameters
Merge branch 'devel' of github.com:htgt/Design-Creation into devel