Create HFI_plot.pro

Some IDL utilities used in the IDL_plot_template file -- LS.
Create LS_HFI_PIPfig_sample_ver_Jan2013.pro

IDL script to produce a CMB angular power spectrum plot in the three basic A&A widths.  Also produces dual-row plots at the 3 standard widths.
Removed HFI_plot in order to relocate it to a subfolder
Removed the IDL example script in order to relocate it to a subfolder
Added HFI_plot.pro to the IDL subfolder
Added PowerSpectrum_fig_example.pro to the IDL subfolder
Merge pull request #1 from Lspencer/master

IDL examples