Reimplement tuple:find() and tuple:findall() using Lua

Fixes #193
Remove wal_fsync_delay mode

Closes #237
Merge branch 'gh-193-tuple-find'
Update a result file (gh-193, tuple find is broken).
Fix #145: box/bad_trigger test fails
Fix warnings and broken spec's fields for brew test-bot
Merge branch 'stable'
Give a nice error message when trying to run a non-existing script.
gh-237: review fixes. Do not fsync WAL when the file is opened in O_SYNC mode.
Merge branch 'gh-237-fsync-delay'
Merge branch 'master' of https://github.com/tarantool/tarantool
Merge branch 'master' of https://github.com/tarantool/tarantool