GH-34 Lua Logging

[phy1um]

Resolves #34

Lua Logging API

Add logging API to Lua so that logs from Lua show line number and file name. Remove all instances of Lua print()

New APIs

• LOG.trace
• LOG.debug
• LOG.info
• LOG.warn
• LOG.error
• LOG.traceLevel
• LOG.debugLevel
• LOG.infoLevel
• LOG.warnLevel
• LOG.errorLevel