some cleanup, added some rough parser tests, and started altering the engines section

tests/parser/.gitignore

@@ -0,0 +1,4 @@
+*
+!Makefile
+!.gitignore
+!*.sby

tests/parser/Makefile

@@ -0,0 +1,2 @@
+SUBDIR=parser
+include ../make/subdir.mk

tests/parser/engines.sby

@@ -0,0 +1,13 @@
+[options]
+mode bmc
+depth 1
+expect error
+
+[engines]
+smtbmc
+
+[engines bmc]
+smtbmc
+
+[engines cover]
+smtbmc

tests/parser/options.sby

@@ -0,0 +1,4 @@
+[options]
+mode bmc
+depth 1
+expect error

tests/parser/setup.sby

@@ -0,0 +1,8 @@
+[options]
+mode bmc
+depth 1
+expect error
+
+
+[setup]
+enable *

tests/parser/stage.sby

@@ -0,0 +1,12 @@
+[options]
+mode bmc
+depth 1
+expect error
+
+
+[stage stage_1]
+mode prove
+depth 20
+timeout 60
+expect error
+enable *