(PE-3443) Fix refer-clojure typo in sync.clj

Fixed typo in sync.clj in the (:refer-clojure) argument to ns.  :exclute
is now :exclude and the prior warning about references from
puppetlabs.http.client.sync/get overriding clojure.core/get is now
suppressed.
Merge pull request #2 from camlow325/maint/master/PE-3443-fix-refer-clojure-typo

(PE-3443) Fix refer-clojure typo in sync.clj
lein-release plugin: preparing 0.1.4 release
lein-release plugin: bumped version from 0.1.4 to 0.1.5-SNAPSHOT for next development cycle
(PE-3377) Use certificate-authority lib for ssl instead of KS
Merge pull request #3 from cprice404/maint/master/PE-3377-use-ca-lib-for-ssl

(PE-3377) Use certificate-authority lib for ssl instead of KS
Update CHANGELOG for 0.1.4 release
lein-release plugin: preparing 0.1.5 release
lein-release plugin: bumped version from 0.1.5 to 0.1.6-SNAPSHOT for next development cycle
Support SSLContext configured with only CA cert
Cleanup and additional test based on PR feedback
Merge pull request #4 from cprice404/feature/master/PE-3484-support-sslcontext-with-ca-cert-only

Support SSLContext configured with only CA cert
Add missing pem file
Merge pull request #5 from cprice404/bug/master/add-missing-pem-file

Add missing pem file
Update CHANGELOG for 0.1.6 release
lein-release plugin: preparing 0.1.6 release
lein-release plugin: bumped version from 0.1.6 to 0.1.7-SNAPSHOT for next development cycle
Add CONTRIBUTING.md
(PE-3769) Build source jars and use explicit JDK target version
Bump jvm-ca version to 0.1.5