make coveralls token secure, install rocksdb from ppa

.coveralls.yml

@@ -1,2 +0,0 @@
-service_name: travis-pro
-repo_token: 9bO9xcnxkkust83M5W1RCApsx440aWZHF

.travis.yml

@@ -10,7 +10,6 @@ cache:
   directories:
   - target/debug/deps
   - target/debug/build
-  - rocksdb-3.13.1
 addons:
   apt:
     packages:
@@ -18,11 +17,9 @@ addons:
     - libelf-dev
     - libdw-dev
 before_script: |
-  [ -d "rocksdb-3.13.1" ] &&
-  wget https://github.com/facebook/rocksdb/archive/rocksdb-3.13.1.tar.gz &&
-  tar -zxvf rocksdb-3.13.1.tar.gz &&
-  cd rocksdb-rocksdb-3.13.1 &&
-  make shared_lib && sudo make install && cd
+  add-apt-repository "deb http://ppa.launchpad.net/giskou/librocksdb/ubuntu trusty main" &&
+  apt-get update &&
+  apt-get install -y librocksdb
 script:
 - cargo build --verbose $FEATURES
 - cargo test --verbose $FEATURES
@@ -31,7 +28,7 @@ after_success: |
   wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
   tar xzf master.tar.gz && mkdir kcov-master/build && cd kcov-master/build && cmake .. && make && make install DESTDIR=../tmp && cd ../.. &&
   ls target/debug &&
-  ./kcov-master/tmp/usr/local/bin/kcov --coveralls-id=$TRAVIS_JOB_ID --exclude-pattern=/.cargo target/kcov target/debug/ethcore* &&
+  ./kcov-master/tmp/usr/local/bin/kcov --coveralls-id=${COVERALLS_TOKEN} --exclude-pattern=/.cargo target/kcov target/debug/ethcore* &&
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
   [ $TRAVIS_RUST_VERSION = nightly ] &&
@@ -44,3 +41,4 @@ after_success: |
 env:
   global:
     secure: 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
+    secure: 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