docs

git-svn-id: svn://svn.code.sf.net/p/rusefi/code/trunk@6005 f70035ab-f2bc-4b8d-aa29-9bd2fd43cf08
base fuel gauge & refactoring & 'enable can' & tiny fix & better defaults

git-svn-id: svn://svn.code.sf.net/p/rusefi/code/trunk@6006 f70035ab-f2bc-4b8d-aa29-9bd2fd43cf08