Change coding style

Use scripts/indent.sh to change coding style
Update coding style in .editorconfig
Run scripts/indent.sh again
Update .editorconfig for *.am
Change indent to space in CMakeLists.txt
Add include directory to indent
Change header coding style
Update NEWS
Sync get_search_path with windows-chewing-tsf
Fix off-by-one problem
Update NEWS
Change ZUIN_SIZE to BOPOMOFO_SIZE
Correct comment of init_database.c

Signed-off-by: ChangZhuo Chen (陳昌倬) <czchen@gmail.com>
rename obsolete Zuin to Bopomofo
Revise API implementations for all Zuin to Bopomofo occurrence

Now, <include/chewing.h> provides API compatibilities. However, we do
have to sync with the existing projects using libchewing.
Revise chewing_bopomofo_String documentation
Update NEWS
Remove null directive
private: trivial format tweaks
improve backward compatibility by providing deprecated functions