Do not try to start gdb if do not know how to do it.

Implement test-runner options that allows to put vardir in /dev/shm.

Test runner: use spaces to align test results.

Implement a basic SQL parser.

Implement SQL statements: INSERT, UPDATE, DELETE,
PING.

Add a test case that tests INSERT/SELECT/DELETE.

Other changes:

Remove support for result-prefix from admin.py
Rename admin.py to tarantool (tarantool client).
Add readline support to tarantool client.
Make sql.g and sql.py independent from yapps
Add gdb support to ./test-run
Disable all optimizations when compiling with DEBUG.
Fix a few bugs discovered by trial and error in silverbox
protocol description.
Add automatic reconnection in case of server disconnect
to test connections. This is used to automatically
reconnect to the server after server restart or reinstall.
Implement soft and hard (with and without removal of vardir)
server restart.
Make show.test results independent from other tests (data I/O
skews statistics, and there is no way to reset it without
restarting the server).
Add  TCP_NODELAY to fiber sockets.

* core-config-reread:
  [core] rename 	chkconfig -> check_config 	mod_reloadconfig -> mod_reload_config
  [core] fix tipo in va_end
  [core] do va_end at the end of tbuf_vprintf
  [box] add more tests for config reloading
  [box] add 'ro' and 'required' modificators for namespaces and their subarrays
  indent
  [box] add tests for config reloading
  [box, feeder] add 'ro' and 'required' attributes
  [core] format 'reload configuration' command answer
  [core] print CRLF in config related logs
  [core] update confetti
  [core] remove unused config file open
  [box] update tests
  [core] update confetti
  [core] chkconfig: return 1 in case of bad config
  [core] add more checks during config reloading
  [core] fix tbuf_vprintf
  [core] dup config before config reloading
  [core] 	add chkconfig 	add 'reload configuration' command for admin console

	chkconfig -> check_config
	mod_reloadconfig -> mod_reload_config

	Fix output to be YAML parsable.
	Fix test to actually check for YAML syntax.
	Use CRLF consistently.

Conflicts:
	cfg/warning.c
	core/tarantool.c
	include/say.h
	include/tarantool.h

* core-error-reporting:
  [core] Fix wording.
  [core] Cleanup error reporting.

* core-help:
  [core] Simplify tests.
  [core] Align help to fit 80 chars. Add more tests. Fix indening.
  Bug#684700 -h and --help options are broken
  Bug#684700 -h and --help options are broken
  Bug#684700 -h and --help options are broken
  [core] Implement command options parsing via gopt.
  [core] Enable --help switch.

Merge with the master (new version of the test-runner).
Fix failing tests.

Post-review fixes: realign help text to match
exactly GNU tools (21st column), reorder help
messages to provide most relvant options first,
edit help text, print values for default options.

Style edits of gopt option library:
add API comments, remove trailing spaces.

Fir a formatting bug accidentally introduced by
the previous patch.