Fixing typo, 'an' should be used when preceding a vowel sound
Fixing typo, 'them' should be used when referring to multiples of something
Fixing typo, 'bu' => 'but'
Fixing typo, added missing closing code quote
Update 45_Mapping.asciidoc

exception, not error.
Update Preface.asciidoc

"3am in the morning" is redundant.
Update 25_Tutorial_Indexing.asciidoc

Use consistent punctuation in bulleted lists.  All items are complete sentences, so all can be period-terminated.
Removed superfluous parenthesis
Merge pull request #80 from adamjgray/patch-1

Update Preface.asciidoc
Merge pull request #81 from adamjgray/patch-2

Update 25_Tutorial_Indexing.asciidoc
Update 30_Tutorial_Search.asciidoc

Update the GET doc response to show the actual response, not just the original JSON.  

Fixes #85
Merge pull request #83 from MartijnDwars/patch-1

Removed superfluous parenthesis
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