Moving from govendor to dep, updated dependencies (#48)

* Moving from govendor to dep.

* Making the pull request template more friendly.

* Fixing akward space in PR template.

* goimports run on whole project using ` goimports -w $(find . -type f -name '*.go' -not -path "./vendor/*" -not -path "./gen-go/*")`

source of command: https://gist.github.com/bgentry/fd1ffef7dbde01857f66

vendor/git.apache.org/thrift.git/build/appveyor/download_openssl.py

@@ -0,0 +1,41 @@
+import urllib.request
+import sys
+
+OUT = 'Win64OpenSSL.exe'
+
+URL_STR = 'https://slproweb.com/download/Win64OpenSSL-%s.exe'
+
+VERSION_MAJOR = 1
+VERSION_MINOR = 0
+VERSION_PATCH = 2
+VERSION_SUFFIX = 'j'
+VERSION_STR = '%d_%d_%d%s'
+
+TRY_COUNT = 4
+
+
+def main():
+    for patch in range(VERSION_PATCH, TRY_COUNT):
+        for suffix in range(TRY_COUNT):
+            if patch == VERSION_PATCH:
+                s = VERSION_SUFFIX
+            else:
+                s = 'a'
+            s = chr(ord(s) + suffix)
+            ver = VERSION_STR % (VERSION_MAJOR, VERSION_MINOR, patch, s)
+            url = URL_STR % ver
+            try:
+                with urllib.request.urlopen(url) as res:
+                    if res.getcode() == 200:
+                        with open(OUT, 'wb') as out:
+                            out.write(res.read())
+                            print('successfully downloaded from ' + url)
+                            return 0
+            except urllib.error.HTTPError:
+                pass
+            print('failed to download from ' + url, file=sys.stderr)
+    print('could not download openssl', file=sys.stderr)
+    return 1
+
+if __name__ == '__main__':
+    sys.exit(main())