Changes from v1.0-0 to v1.0-6

* Changed the location of the sample files from the 'doc' folder to 'extdata'
* Changed the opening message and lod_GWAS example to account for different file structures on different installs
* Added stats & util functions to NameSpace

Changes from v1.0-6 to v1.0-7
* Changed the example code of lod_GWAS to make it compatible with non-Windows versions of R
* Fixed a typo in the example code of lod_QC
