Removed unneeded files from 105.
Added .gitignore files.
Updated readme.
Renamed "Make SMCL *.do".
Renamed Macros.do as Mata.do.
Renamed the introductory pseudo-SMCL file.
Removed automatic problem set directive creation.
Removed guide to pseudo-SMCL directives.

This is now in the readme.
Removed constant definition code from 105.
Added "Do to SMCL.do" to the repo.

It is now no longer automatically backed up; Git will do this.
"Shared directives.do" adds shared pseudo-SMCL directives.

It contains directives shared across the Stata training courses.
Modified parameters at top of "Make SMCL.do".
Modified "Make SMCL.do" file and directory paths.
Modified the header of the SMCL files.
Removed the date of last revision.
Modified Mata.do so that it compiles.