token: push grn_token_mode to grn_ctx for tokenizer
token: add tokenizer token skip
token: add tokenizer token skip with position
tokenizer: add token_mode in grn_tokenizer_query
token uvector: add token_mode pop
test: remove a needless test

Now, "*" isn't syntax error. Groonga searches "*" itself.
test: add a syntax error pattern
Merge pull request #193 from naoa/add-token-position-skip

push grn_token_mode to ctx and  add tokenizer token skip/skip with position for tokenizer

Patch by Naoya Murakami. Thanks!!!
tokenizer: add new member to the last of structure

It is for keeping ABI compatibility.
tokenizer: fix a typo
doc: accept a bug report in Japanese on GitHub issue tracker

[groonga-dev,02651]

Reported by 6elz. Thanks!!!
deb: add missing copyright about Sphinx bundled javascript
test select near: add a test for 'X N*"a z" Z' case