Adding the function ps_is_instrument_default_enabled() which returns whether a given instrument is enabled by default for the MySQL version used.
Adding README for the ps_is_instrument_default_enabled() function.
Include the function ps_is_instrument_default_enabled() in MySQL 5.6 and 5.7
Adding the function ps_is_instrument_default_timed() which returns whether a given instrument is timed by default for the MySQL version used.
Adding README for the ps_is_instrument_default_timed() function.
Include the function ps_is_instrument_default_timed() in MySQL 5.6 and 5.7
Use the functions ps_is_instrument_default_enabled() and ps_is_instrument_default_timed() when resetting setup_instruments to the default
Merge remote branch 'upstream/development' into dev/issue_15_reset_to_default

Conflicts:
	README.md
	sys_56.sql
	sys_57.sql
Merge pull request #20 from JesperWisborgKrogh/dev/issue_15_reset_to_default

Dev/issue 15 reset to default