Patch to include switch for island warning as proposed in #295. The method  is modified as well to include the switch
- start of changelog for 1.6
Merge branch 'master' of github.com:pysal/pysal into changelog_1.6
- updating changelog
- preparing for release, version updates
silent_island_warning implemented for w_clip
silent_island_warning implemented for w_symmetric_difference. Previous commit included support of silent_island_warning for WSP2W as well
silent_island_warning implemented for w_difference
silent_island_warning implemented for w_intersection
silent_island_warning implemented for w_union
Merge branch 'master' of github.com:pysal/pysal into changelog_1.6
Merge pull request #310 from darribas/w_silent_island_warning

W silent island warning
Merge branch 'master' of github.com:pysal/pysal into changelog_1.6
- version bump and changelog prior to tagging 1.6
- updating news and links
Merge pull request #311 from sjsrey/changelog_1.6

Changelog 1.6
version bump to 1.7dev
Merge pull request #312 from sjsrey/bump1.7

version bump to 1.7dev