Add support for Linux Mint (as an ubuntu variant) to the build scripts

Changes in order to get rid of contract warnings

Fix/add back cmake defaults

Update permission without waiting on apply block check.

Temporary/re enable floating point

multi_index refactor and additions to make interface more consistent with Boost MultiIndex

Added cmake defaults for dependency root directories

(unofficial) FreeBSD build support & fixups

#1542 ensure sync keeps going the best it can.

Added mongo drivers to Darwin build.

Also bring back overloads of modify and erase that take a reference to
the object.

Added softfloat dependency and interface header

This makes our multi_index interface a little more consistent with Boost
multi_index.

Added support for installing MongoDB via homebrew and compiling mongo-c-driver-1.9.3 && mongo-cxx-driver to darwin OS

This makes our multi_index interface more consistent with Boost
multi_index.

Also added iterator_to.

Enable exchange constract in test stat565

Add reverse_iterator support in multi_index

changing game_exists variable name to make the logic more clear

Fixed Abi tables.name attribute, fix https://github.com/EOSIO/eos/iss…

Fix typo

change from "thow" to "throw".

Allow construction of fixed_key with arrays of different word sizes

Docker re-add mongo