gstlal_inspiral_plot_background_fix

gstlal_inspiral_plot_background: this commit removes the functionality of adding Rankingstat and RankingstatPDF objects for the same template ids. It also prevents loading all dist_stats files in memory at one time. Finally, a bug fix is to identify bin_id from the filename

requested review from @leo.tsukada

added 1 commit

• a2dd45ad - gstlal_inspiral_plot_background: added fixme, bug-fixed verbose statement

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added 3 commits

• 3cf6424b - 1 commit from branch master
• fb5022ee - gstlal_inspiral_plot_background: this commit removes the functionality of...
• a37001ea - gstlal_inspiral_plot_background: added fixme, bug-fixed verbose statement

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merged