Move validation into PlinkValidator class; add PlinkToolsError class
Add no-validate option and validate argument to merge
Merge pull request #8 from iainrb/devel

Changes for release 0.3.2
Merge pull request #9 from wtsi-npg/devel

Changes for release 0.3.2
Check exit status of system calls
Merge pull request #10 from iainrb/devel

Check exit status of system calls
Merge pull request #11 from wtsi-npg/devel

Check exit status of system calls
Added basic test for executable scripts
Suppress output from 'which plink'
Correct argparse typo
Merge pull request #12 from iainrb/devel

Minor tweaks for release
Merge pull request #13 from wtsi-npg/devel

Devel