add new option and version exceptions

Author: tony

libtmux/exc.py

@@ -27,6 +27,13 @@ class TmuxCommandNotFound(LibTmuxException):
     pass
 
 
+class VersionTooLow(LibTmuxException):
+
+    """Raised if tmux below the minimum version to use libtmux."""
+
+    pass
+
+
 class BadSessionName(LibTmuxException):
 
     """Disallowed session name for tmux (empty, contains periods or colons)."""
@@ -53,3 +60,10 @@ class InvalidOption(OptionError):
     """Option invalid to tmux, introduced in tmux v2.4."""
 
     pass
+
+
+class AmbiguousOption(OptionError):
+
+    """Option that could potentially match more than one."""
+
+    pass