Merging master into eosio_build_option/amazon

Fix for 2416 : discriminating prefixes 

Compatible with Ubuntu 17

Using underscore makes it easier to double click and copy

Fixed typo parmeters -> parameters in "hello"

unused import in Hello contract

typo condtion -> condition

Remove fc's bz2 unused linkage

merging fedora changes into darwin eosio_build_option

merging master into eosio_build_option

The Ricardian contract "hello.hi_rc.md" of "Hello" example smart contract had a typo, fixed that.

eosiolib/eosio.hpp already contains print

fc links to bz2 but this isn't required. Nothing uses bz2 and the HAS_BZIP2 macro that is set is not used anywhere. Remove this as it causes a runtime dependency that is 100% unneeded

Fix for wasm call depth issue, eos #2260

Merging master into eosio_build_option

Added options for cmake_build_type, codeCoverage & doxygen. Added check for directory script is being run from

syncus-interruptus

Remove log-level-net-plugin option completely

This option is already a NOOP, so remove it entirely from the unit tests so it can be entirely removed. Though, it is rather unfortuate that the scripts are not modified to use a logging.json to retain the debug print verbosity now

delete_auth_test should use eosio.token contract not currency

Remove spurious carriage returns from various log messages.