temp files

[funderburkjim]

It is convenient to have files whose directory or file name starts with 'temp' and which are not tracked by git.

• in csl-orig, rename two files by removing the 'temp_' prefix. These renamed files still tracked by git
  • temp_mw_01_iast_plain_AB.txt -> mw_01_iast_plain_AB.txt
  • temp_mw_01_iast.txt -> mw_01_iast.txt
• revise .gitignore
  • temp* files with names starting with 'temp' not tracked
  • *~ files ending in ~ (these are generated by Emacs, and should not be tracked by git)
  • __pycache__ directories made by Python which do not need to be tracked by git.