Fix the explanation of "coord" in the bool query.
Added set_trans to list of stemmed words.
Update 35_Tutorial_Aggregations.asciidoc
Update 40_Tutorial_Conclusion.asciidoc
Update 35_Bulk_format.asciidoc
Added a callout on minimum_should_match showing the change from
75% to the absolute value of 2

Closes #76
small typo fix
Fixed small typo in 15_Search_options.asciidoc

There was an 'and' missing in the `timeout` paragraph.
Chapter: 200_Identifying_words
Added a section about char_filters
ICU tokenizer breaks on different scripts
Token normalization chapter - requires update after icu_collation fields are implemented
Fixed a bad ref