[lmi] Return of the secret decoder ring

[Greg Chicares]

It's handy to modify data files in (by default) /opt/lmi/data
experimentally during an lmi session. MST->XST obfuscation
has made that less convenient. To restore convenience, I'll
soon push a 'gwc/invert.sh' script that does this:

/tmp/lmi/tmp[0]$pushd /tmp/lmi/tmp                  
/tmp/lmi/tmp[0]$cp -a /opt/lmi/data/*upper*.xst .   
/tmp/lmi/tmp[0]$cp -a /opt/lmi/src/lmi/*lower*.mst .
/tmp/lmi/tmp[0]$ls
finra_footer_lower.mst  reg_d_group_footer_lower.mst  
reg_d_indiv_footer_lower.mst
finra_footer_upper.xst  reg_d_group_footer_upper.xst  
reg_d_indiv_footer_upper.xst
finra_header_lower.mst  reg_d_group_header_lower.mst
finra_header_upper.xst  reg_d_group_header_upper.xst
/tmp/lmi/tmp[0]$/opt/lmi/src/lmi/gwc/invert.sh 
/tmp/lmi/tmp[0]$ls
finra_footer_lower.mst  finra_header_upper.xst        
reg_d_group_header_upper.mst
finra_footer_lower.xst  reg_d_group_footer_lower.mst  
reg_d_group_header_upper.xst
finra_footer_upper.mst  reg_d_group_footer_lower.xst  
reg_d_indiv_footer_lower.mst
finra_footer_upper.xst  reg_d_group_footer_upper.mst  
reg_d_indiv_footer_lower.xst
finra_header_lower.mst  reg_d_group_footer_upper.xst  
reg_d_indiv_footer_upper.mst
finra_header_lower.xst  reg_d_group_header_lower.mst  
reg_d_indiv_footer_upper.xst
finra_header_upper.mst  reg_d_group_header_lower.xst
/tmp/lmi/tmp[0]$head --lines=1 *upper*.mst
==> finra_footer_upper.mst <==
{{!

==> finra_header_upper.mst <==
{{!

==> reg_d_group_footer_upper.mst <==
{{!

==> reg_d_group_header_upper.mst <==
{{!

==> reg_d_indiv_footer_upper.mst <==
{{!