Changes in version 1.2 (Sep 2019)
====================================
	- "parameters" section in the configuration file was changed to "input_parameters"
	- Configuration file sections are checked for consistency
	- Output file names are changed from SNPs to vars. This is because they might contain INDELs too.
	- Merging of data sets are done with data.table method instead of merge() function.
	- Vignette is updated.
	- Added compatibility for older versions of R.

Changes in version 1.3 (Nov 2019)
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 - S4 object system is used for defining classes and main functions. Package is now much more disciplined compared to the previous version which was in S3.
 - Printing of all log messages to the terminal can now be disabled by using suppressMessages() function.
 - Minor improvement in code.
