pyparsing and pygments are now actual dependencies.

For political reasons I have made pyparsing and pygments actual dependencies.
It seems that unless bpython actually won't work without these two packages
then certain Norwegian people will not package bpython for Ubuntu with them
as actual dependencies, meaning people would have to apt-get install them
separately (by which point they would probably have decided bpython sucks and
won't ever use it again). Jorgen is right, though - they are a huge part
of what makes bpython what it is, so they should be dependencies.

bpython.py

@@ -43,7 +43,7 @@ import termios
 import fcntl
 import string
 import shlex
-from bpython.formatter import BPythonFormatter
+import pydoc
 
 class Dummy( object ):
     pass
@@ -51,31 +51,15 @@ OPTS = Dummy()
 
 OPTS.auto_display_list = True
 
-try:
-    from pygments import highlight
-    from pygments.lexers import PythonLexer
-except ImportError:
-    OPTS.syntax = False
-else:
-    OPTS.syntax = True
+from pygments import highlight
+from pygments.lexers import PythonLexer
+from bpython.formatter import BPythonFormatter
+OPTS.syntax = True
 
-try:
-    from pyparsing import Forward, Suppress, QuotedString, dblQuotedString, \
-        Group, OneOrMore, ZeroOrMore, Literal, Optional, Word, \
-        alphas, alphanums, printables, ParseException
-except ImportError:
-    OPTS.arg_spec = False
-    print ("pyparsing could not be imported properly, " 
-    "parameter list spec will not work." )
-# XXX: This is for later, as the loadrc function checks that it got imported okay.
-# pyparsing will still be in sys.modules even if only part of the import works, so
-# this makes sure only a clean import happens or no import at all.
-    if 'pyparsing' in sys.modules:
-        del sys.modules['pyparsing']
-else:
-    OPTS.arg_spec = True
-
-import pydoc
+from pyparsing import Forward, Suppress, QuotedString, dblQuotedString, \
+    Group, OneOrMore, ZeroOrMore, Literal, Optional, Word, \
+    alphas, alphanums, printables, ParseException
+OPTS.arg_spec = True
 
 # TODO:
 #