Update item_names.csv

Italian names BW2 items
Correct Japanese names for a few Kalos Pokémon.

I double-checked against http://wiki.ポケモン.com/wiki/ポケモン一覧 .
(Apologies for the likely-unclickable URL but it was really really long
otherwise.)

Flabébé was using hiragana べ instead of katakana ベ.  Those were the
only hiragana in the csv.
Sync Pokémon moves with Showdown.
Sync move stats with Showdown.
Put the hyphen back in Lock-On's name.

Showdown's data files said "Lock On" in a bunch of places, so I assumed
it had changed.  I was wrong!  Oops.  Thanks to Chispy for confirming
that it hadn't.
Add ability changes for Feebas, Milotic, and Zapdos.
Merge pull request #100 from valepert/patch-3

Merge valepert's Italian names for B/W 2 items. #100
Dynamically mangle long table names for Oracle; Unicode → UnicodeText.
Sort out all the non-nullable columns with empty values.
General code tidying for this Oracle fix.
Merge branch 'oracle'. #109
Update the docstring on rewrite_long_table_names.
Correct the descriptions for the Razor Claw and Razor Fang.
Add Diancie.
Load/dump dance.
Add Hold Back and Diamond Storm.
Sync moves with Showdown. #116
Fix Diamond Storm's type.
Add Diancie to the Undiscovered egg group.
Improve effects for new moves and abilities a little.