0.12.0

• [core-Breaking Change] hash literal now using "\#" instead of "##"
• [all] upgrade project to netcoreapp2.0
• [core] if statement now support equals to boolean literal(== true/false)
• [core] sdmap can now live with error close curly brace } harmony.
• [core] sdmap can now support close curly brace } litera, using "\}"
• [ext] add SdmapContext
• [ext] rename ISqlEmiter to ISdmapEmiter
• [ext] rename EmitSql in ISqlEmiter to Emit
• [ext] not rely on System.Threading.Thread package.