Coding style

- Moved path_colored into lscolors.
  - Made lscolors a package.
  - Moved LS_COLORS.sh and LSCOLORS into lscolors.
- Moved fill3.join into termstr so that lscolors
  can depend on termstr only.

termstr/termstr.py

@@ -177,6 +177,15 @@ def _pad_wide_chars(str_):
     return str_ if len(padded_str) == len(str_) else padded_str
 
 
+def join(seperator, parts):
+    if parts == []:
+        return ""
+    try:
+        return seperator.join(parts)
+    except TypeError:
+        return TermStr(seperator).join(parts)
+
+
 class TermStr(collections.UserString):
 
     def __init__(self, data, style=CharStyle()):