lua-simplelog  Check-in [64435ecf59]

up log files in the log directory. The loggers keep up with dates and
roll to a new file when the date changes. It provides for multiple
levels out of the box. Each log can use either the default write
settings, or their own. Write settings allow for telling the logger
which level's are enabled for which output.

## Future
- Perhaps allow dynamically adding levels and/or writers?

## Usage
    local log_config = {
      -- this directory must exist!
      dir = '/tmp/simplelog',
      daemonized = true,
      debug_info = true,
................................................................................
    log_manager:close_all()

## Documentation

### Levels
These are the available log levels in order of importance with highest
importance being listed last.
- trace
- debug
- info
- warn
- error
- fatal

### Log manager
This is what's returned when you import the module.

Once you initialize a manager with a config like
`local manager = (require 'simplelog')(cfg_table)`
the following functions become avaliable:

Functions:
- open(string name) - opens a log file with the name given and creates
  said file under the directory given in the configuration. Returns
  the log file object.
- close(string name) - closes a previously opened log file by name
- closeall() - closes all log files managed by this manager

**Configuration is explained below:**
Excerpt from example:

      dir = '/tmp/simplelog',
      daemonized = true,
      debug_info = true,
................................................................................
    }

The table key `dir` is required and is the directory in which log
files will be created. The `logs.default` is also required. The rest
is optional.

Manager configuration:
- dir : The directory to which log files will be written.
- daemonized : Used to determine if it is neccessary to disable
  stdout/stderr logging.
- debug_info: If enabled, the logger will include source line info in
  the output.

Log Configuration:

Each log can be configured to only write log lines above a certain
level. If a log, specified by name in the config, exists, then that
configuration is used for determining when to write information,

up log files in the log directory. The loggers keep up with dates and
roll to a new file when the date changes. It provides for multiple
levels out of the box. Each log can use either the default write
settings, or their own. Write settings allow for telling the logger
which level's are enabled for which output.

## Future
* Perhaps allow dynamically adding levels and/or writers?

## Usage
    local log_config = {
      -- this directory must exist!
      dir = '/tmp/simplelog',
      daemonized = true,
      debug_info = true,
................................................................................
    log_manager:close_all()

## Documentation

### Levels
These are the available log levels in order of importance with highest
importance being listed last.
* trace
* debug
* info
* warn
* error
* fatal

### Log manager
This is what's returned when you import the module.

Once you initialize a manager with a config like
`local manager = (require 'simplelog')(cfg_table)`
the following functions become avaliable:

Functions:
* open(string name) - opens a log file with the name given and creates
  said file under the directory given in the configuration. Returns
  the log file object.
* close(string name) - closes a previously opened log file by name
* closeall() - closes all log files managed by this manager

**Configuration is explained below:**
Excerpt from example:

      dir = '/tmp/simplelog',
      daemonized = true,
      debug_info = true,
................................................................................
    }

The table key `dir` is required and is the directory in which log
files will be created. The `logs.default` is also required. The rest
is optional.

Manager configuration:
* dir : The directory to which log files will be written.
* daemonized : Used to determine if it is neccessary to disable
  stdout/stderr logging.
* debug_info: If enabled, the logger will include source line info in
  the output.

Log Configuration:

Each log can be configured to only write log lines above a certain
level. If a log, specified by name in the config, exists, then that
configuration is used for determining when to write information,