use `int` in place of `char` when you compare it to EOF
restore some redundant changes
update xfile
update xfile
Merge branch 'master' into rspi
Merge branch 'master' into rspi

Conflicts:
	src/read.c
undocument pic_defmacro
define 'define-library' as a macro
define 'import' and 'export' as macros
support renaming import (including 'only', 'rename', 'except', 'prefix' clauses)
add renaming-import test
update docs
remove debug print
Merge branch 'renaming-import'
refactor macroexpand-1
Merge pull request #181 from KeenS/rspi

Fix build error on Raspberry Pi
add main.scm
call main.scm inside main.c
fix main.scm
no exit