Tiny refine.

dotfiles/gitconfig: Sort entries of each category in alphabetical order.
Add anthy2ime feature.

Convert from Anthy private dictionary to text file adapted for
Microsoft Japanese IME.
Update teraterm.

New version is 4.75.
Sync up configuration files to TeraTerm 4.77.

	* TERATERM_TERATERM.INI: Update directives.
	* TERATERM_cygterm.cfg: Ditto.
Change some keybinding for Google IME.

	* GJI_romantab: Change binding for z{, z}.