Fix snpEff version detection (issue #165)

Recent SnpEff versions don't have the "SnpEff" name in the version
information anymore, which breaks loading (maj_version will become None)

This patch fixes the issue by:

- cleaning the string up (no more nested quotes)
- splitting the string
- checking if the first token includes "SnpEff"
Merge pull request #166 from cswegger/fix-snpeff-version

Fix snpEff version detection (issue #165)
Bump ipython-cluster-helper to the latest revision
Added high-impact burden summary and c-alpha test.
Added scipy as a dependency.
Add documentation of default -d 30 value in de_novo analysis.
Merge pull request #169 from jxchong/patch-1

Add documentation of default -d 30 value in de_novo analysis.
add useful columns to mendelian disease tools
Merge pull request #171 from udp3f/master

add useful columns to mendelian disease tools
Clarified the --allow-other-hets option

I understood it to mean that if >1 person was compound het for a pair of variants, the variants were excluded (vs if >1 person is het any variant, that variant is excluded).
Merge pull request #172 from jxchong/patch-3

Clarified the --allow-other-hets option
Typo: can -> can't :)
Merge pull request #174 from jxchong/patch-4

Typo: can -> can't :)
[ENH] allow 0 or -9 in PED for unknown parent
[BUG] auto_dom: if one parent is affected, candidates should solely be in child and said parent.
throw a useful(?) error for invalid queries
remove extraneous commit
[ENH] de_novo; add --filter, --columns, and --gt_filter.; default -d to 0; don't enforce num_het== 1
[ENH] auto_dominant; add --filter, --columns, and --gt_filter.
[ENH] auto_recessive; add --filter, --columns, and --gt_filter.