Fix maps race in append and merge tests
Fix TestWriteDot random order error
include terraform in published package name
Fix graphviz_test with test table

The tests were explicitly checking order where the underlying implementation is `map[string]*BasicNode`. This PR addresses the order which is not known and within the test I create a test table to allow multiple tests (2 in this PR rather than 1).
command: terraform.tfvars loaded by default if it exists
helper/ssh: error if private key on SSH [GH-73]
config: additional tests for sanity
terraform: multi-variables work with count = 1 [GH-115]
fmt
Travis
Travis file should be unix line endings
config: accept file("test.txt") [GH-145]
Update CHANGELOG
Merge pull request #121 from JasonGiedymin/master

digraph: fix graphviz_test with test table
Revert "Merge pull request #121 from JasonGiedymin/master"

This reverts commit d3819e3209e32d2e88ec481d5a9cd11444b81c3f, reversing
changes made to ea4210b2067dddb35d7ff9119ed43323b2117910.
Merge pull request #61 from carlosdp/fix-maps-race

Fix maps iteration order error in append_test, merge_test, and graphviz_test
Merge pull request #100 from aussielunix/zipfilename

scripts: include 'terraform' in published package name
scripts: underscore instead of hyphen
make clean should remove y.go
add contributing guide