Revert "Revert ".control and `B' parser, fix precedence of '-' versus '^'""

This reverts commit adc1546e59.

src/frontend/parse-bison.y

@@ -90,8 +90,8 @@
 %right  ','
 %left   '-' '+'
 %left   '*' '/' '%'
-%right  '^'      /* exponentiation */
 %left   NEG      /* negation--unary minus */
+%right  '^'      /* exponentiation */
 %left   '[' ']'
 
 %initial-action      /* initialize yylval */

src/spicelib/parser/inpptree-parser.y

@@ -63,8 +63,8 @@
 %left   TOK_LE TOK_LT TOK_GE TOK_GT
 %left   '-' '+'
 %left   '*' '/'
-%left   '^'      /* exponentiation */
 %left   NEG '!'  /* negation--unary minus, and boolean not */
+%left   '^'      /* exponentiation */
 
 %initial-action      /* initialize yylval */
 {