Fix PATH for all scripts (#600)

Author: ZeHiro

Diff for: scripts/build_server.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-PATH="$PATH:./node_modules/.bin"
+PATH="./node_modules/.bin:$PATH"
 
 echo "Build server files..."
 echo "Building CoffeeScript..."

Diff for: scripts/lint.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+PATH="./node_modules/.bin:$PATH"
 
 ./node_modules/.bin/coffeelint -f coffeelint.json -r --color=always . &&\
 ./node_modules/.bin/standard  "server/konnectors/*.js"

Diff for: scripts/tests.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
+PATH="./node_modules/.bin:$PATH"
 
-./node_modules/.bin/mocha \
+mocha \
     --reporter spec \
     --colors \
     --globals clearImmediate,setImmediate \