Closes#4708
This updates jsoncpp, mbedtls, TCLAP and SQLiteCpp to their latest stable release. A few additional changes were needed:
* jsoncpp deprecated Reader, FastWriter and StyledWriter which I've replaced
with some helper functions in JsonUtils.cpp
* SQLiteCpp changed how it builds with external sqlite libraries, now expecting
them to be installed. The simplest path was to remove sqlite from cuberite's
submodule and just use SQLiteCpp's internal version.
On RasPi with gcc 4.8.2, the asserts wouldn't compile when tests were enabled.
Enforced the assumption that ASSERT code is generated only in Debug builds.
This was mostly done automatically and then visually inspected for obvious errors.
All //-style comments should have a 2-space separation from the code, and 1 space after the comment sign.
peterbell10
Mattes D
LogicParrot
tycho
Howaner
Tycho
Tiger Wang