Experimental lexer generator: rename_things(Dfa minimization) += comments

Experimental lexer generator: rename_things(Dfa minimization) += comments

- DfaState.key_matches -> transition_state_with_key.
- action_map -> initial_partitions
- __partition -> __create_initial_partitions
- if k[0] == "terminal_set" or k[0] == "terminal action" or True: this always happens
- other small variable renamings around transition -> transition_state

BUG=
R=dcarney@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=17895

[dcarney, 2013-11-20 08:58:10]

lgtm

[marja, 2013-11-20 08:59:08]

Committed patchset #2 manually as r17895.