checking connection inside loop
using locks for connection
counting connected routines
smal fix
we can avoid this checking
just in case I should check this
using one db connection
using mutex for all connections
fix
returning back old code for manager
test
avoiding reflect
go fmt
Merge branch 'release' into PCT-748--runtime-error-on-nil-conn

Conflicts:
	mysql/mysql_test.go
Merge pull request #76 from percona/PCT-748--runtime-error-on-nil-conn

PCT-748: Agent panic in mysql.(*Connection).Set