[Build] suppress curl/wget progress bars

In the Jenkins console output, `curl` gives us mountains of `#` symbols as it tries to show its download progress.

![noise from curl in Jenkins output](http://i.imgur.com/P2E7yUw.png)

I don't think this is useful so I've changed things to suppress these progress bars. If there is actually some use to this, feel free to reject this proposal.

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #2279 from nchammas/trim-test-output and squashes the following commits:

14a720c [Nicholas Chammas] suppress curl/wget progress bars

dev/check-license

@@ -32,9 +32,9 @@ acquire_rat_jar () {
     printf "Attempting to fetch rat\n"
     JAR_DL=${JAR}.part
     if hash curl 2>/dev/null; then
-      (curl --progress-bar ${URL1} > "$JAR_DL" || curl --progress-bar ${URL2} > "$JAR_DL") && mv "$JAR_DL" "$JAR"
+      (curl --silent ${URL1} > "$JAR_DL" || curl --silent ${URL2} > "$JAR_DL") && mv "$JAR_DL" "$JAR"
     elif hash wget 2>/dev/null; then
-      (wget --progress=bar ${URL1} -O "$JAR_DL" || wget --progress=bar ${URL2} -O "$JAR_DL") && mv "$JAR_DL" "$JAR"
+      (wget --quiet ${URL1} -O "$JAR_DL" || wget --quiet ${URL2} -O "$JAR_DL") && mv "$JAR_DL" "$JAR"
     else
       printf "You do not have curl or wget installed, please install rat manually.\n"
       exit -1

sbt/sbt-launch-lib.bash

@@ -51,9 +51,9 @@ acquire_sbt_jar () {
     printf "Attempting to fetch sbt\n"
     JAR_DL=${JAR}.part
     if hash curl 2>/dev/null; then
-      (curl --progress-bar ${URL1} > ${JAR_DL} || curl --progress-bar ${URL2} > ${JAR_DL}) && mv ${JAR_DL} ${JAR}
+      (curl --silent ${URL1} > ${JAR_DL} || curl --silent ${URL2} > ${JAR_DL}) && mv ${JAR_DL} ${JAR}
     elif hash wget 2>/dev/null; then
-      (wget --progress=bar ${URL1} -O ${JAR_DL} || wget --progress=bar ${URL2} -O ${JAR_DL}) && mv ${JAR_DL} ${JAR}
+      (wget --quiet ${URL1} -O ${JAR_DL} || wget --quiet ${URL2} -O ${JAR_DL}) && mv ${JAR_DL} ${JAR}
     else
       printf "You do not have curl or wget installed, please install sbt manually from http://www.scala-sbt.org/\n"
       exit -1