changed the text body so that every sentence is followed by a line break (easier to compare versions)
added reference to R. Lundkvist's licentiate thesis
wrote a text body for 4.1 System architecture
fixed some spelling errors
changed the outline of chapter 4 slightly: introduced 4.2 schema migration 4.2.1 document design 4.2.2 entity relations 4.3 TouchDB API
wrote a section about (TouchDB/CouchCocoa) API (4.3)
changed the text body so that every sentence is followed by a line break (easier to compare versions)
revised the both the abstract describtipn graph relations (2.2.2 Combinatorial Constraints and Graph relations ) as well as its relational implementation (2.3.2 Faut Model Relational schema), with new graphs and SQL code
wrote a section about NoSQL
Merge commit 'b4e25893bb4b3d386be9e2f6dcc924c27e2036e7'