update doxygen setting to enable processing PACKED macro

update account api documentation

fix account cpp ingroup

update chain c api doc

update db api

update console api

update homepage

update fixedpoint

update fixedpoint api doc

update real api doc

update transactions docs

update types and varint docs

updated doxygen main page

fix problem with db api docs

fix message uncapitalized letter

(cherry picked from commit 8c79f757)

added tests for the WASM currency contract and fixed issues it exposed, refactored contract initialization as a require_recipient where the logic of init vs apply is now in the wasm_interface

begin restoring the test_api contract interface, pull results out of the apply_context into chain controller

Added test for basic wasm contract loading/unloading.  Fixed bugs in the intrinsic code and made it impossible to complile with the same class of bugs in the future.  Did some basic style/renaming in the contracts directory and in the enclosed tutorial/doxygen files