v0.2n - performance improvements, SQL connecction, book updates.

Changes:

• Removed the glossary from the book.
• Numeric QR decomposition for matrices.
• Improve ABCL class file compression.
• graph:minus-edge, graph:minus-vertex
• weighted, directed graphs
• BFS/DFS on graphs, fix dot conflict in fold/scan symbols
• Iterator pipelines.
• Remove synchronisation in environment code
• graph incidence, vertex successors/predecessors
• advanced graph algorithms (Stoer-Wagner minimum cut, Girvan-Newmann clustering, etc...)
• speed up a lot of core interpreter logic by avoiding streams.
• use Undertow instead of Jetty.
• SQL connection
• cons optimisation
• meta state managers.
• flt64: use Maja
• add cmplx64.
• bump jline, etc...
• fix symbols for union and intersection