SQLG2 preprocessor and library

1. Introduction to SQLG2
2. Installation
   1. Download
   2. How to build
   3. How to run examples
3. Preprocessor
   1. Introduction - first example
   2. How preprocessor works
   3. ANT task for SQLG
   4. Details of the first preprocess phase
   5. Details of the second preprocess phase
   6. Details of GBase methods
4. Runtime library
   1. Introduction - first example continued
   2. Connections and transactions
   3. Connection management
   4. Custom mappers
   5. Exotic possibilities
5. API JavaDoc