New api calls#3

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ghost wants to merge 6 commits intojdarcy:masterfrom

mark-goodall:master

Commits on Feb 14, 2014

Changed headers to take const char* where possible
mark-goodall
committed

Commits on May 4, 2014

Merge branch 'master' of github.com:jdarcy/etcd-api
mark-goodall
committed

Commits on May 17, 2014

Commits on Oct 29, 2014