Keep $ symbol

Signed-off-by: Oleg Bulatov <dmage@yandex-team.ru>
More examples

Signed-off-by: Oleg Bulatov <dmage@yandex-team.ru>
Better error message

Signed-off-by: Oleg Bulatov <dmage@yandex-team.ru>
Fix Makefile for OS X

Signed-off-by: Oleg Bulatov <dmage@yandex-team.ru>
Better Lexer

Signed-off-by: Oleg Bulatov <dmage@yandex-team.ru>