Merge branch 'master' into BlockTranslators
Fixed language in Introduction
Fixed language in Overview
Fixed language in "Smalltalk collection messages as SQL Expression"
Fixed language in "SQL tables"
Fixed language in "SQL columns"
Fixed Language partly in "Boolean Operators"
Added expressions sections and fixed language
Fixed language in "Boolean operators"
Fixed language in "SQL functions"
Fixed language in "Comparisons"
Fixed language in "SQL Generators"
Fixed language in "Summary"
Fixed language in "Summary"
Added missing image
Removed notes
Fixed typos
Removed DRAFT
Merge branch 'BlockTranslators'