Add missing includes and tidy up
Clean up and restructure sources
Remove unused macros, config variables, and file
Fix missing includes for boost 1.56.0
Split Section to its own header and add convenience accessors
Move some constants to core/SystemParameters.h
Add fee voting configuration and docs (RIPD-564)
Add account_lines paging (RIPD-343)
Add account_offers paging (RIPD-344)