Add isStatic()

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
Delete canMacroize() which is useless now

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
Add doMacroize method

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
Add macroize-static-funs option (Issue #6)

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>