Bug Fix: utils/cgsymbol_extra.pro

Fix bug whereby the FUNCTION defined in the file utils/cgsymbol_extra.pro was
still called CGSYMBOL.  FUNCTION definition now updated to correspond to routine
name, which itself was changed for conformity with external IDL libraries.
Fix very rare / obscure bug

Fix bug where coincidental "I1" or "I4" is in the GLIMPSE file's full path,
which buggers up the operation.  Change "*I1*" to "*_mosaic_I1.fits",
commensurate with the full filename of GLIMPSE FILES.

This is one of those very-unexpected failure modes, and I'm sure more will crop
up as people start using this code.
	modified:   create_local_files/omni_glimpse_emaf.pro
	modified:   create_local_files/omni_glimpse_starsub.pro
Fix typo and add MODIFICATION HISTORY to previous commit

	modified:   create_local_files/omni_glimpse_emaf.pro
	modified:   create_local_files/omni_glimpse_starsub.pro
Merge branch 'master' into release

Minor bug fixes before release.