v0.017

    Added redo button to design attempts.
    Better formatting of design attempt errors and design parameters.
fix name of subroutine to make it clear is is a common subroutine
add candidate_oligos and candidate_regions to create and update design attempt code
include candidate oligos and candidate regions template code
add templates that show candidate regions and candidate oligos for a design attempt
    Add candidate_oligos and candidate_regions columns to design attempt table