chore/ci: fix travis

rust nightly after Dec-8 will have a problem with crates generating cdylib with cargo clippy (tested with clippy version 0.0.104) - it fails at linking step with - syntax error in version script - error. This is apparantly a bug due to rust-lang/rust#38117. So reverting back to using rust-nightly of 17th Nov 2016 and clippy of v0.0.99.

.travis.yml

@@ -9,7 +9,7 @@ os:
 language: rust
 rust:
   - stable
-  - nightly-2016-12-19
+  - nightly-2016-11-17
 sudo: false
 branches:
   only:
@@ -24,7 +24,7 @@ before_script:
   - if [ "${TRAVIS_RUST_VERSION}" = stable ]; then
       (which rustfmt && cargo install-update rustfmt) || cargo install rustfmt;
     elif [ "${TRAVIS_OS_NAME}" = linux ]; then
-      clippy_vers=0.0.104;
+      clippy_vers=0.0.99;
       if ! cargo clippy --version | grep -q $clippy_vers; then
         cargo install clippy --vers=$clippy_vers --force;
       fi
@@ -64,8 +64,6 @@ script:
     elif [ "${TRAVIS_OS_NAME}" = linux ]; then
         (
             set -x;
-            cargo clippy && cargo clippy --profile=test
-
             cd ffi_utils && unset Features && cargo clippy && cargo clippy --profile=test && export Features="use-mock-routing testing" &&
             cd ../safe_core && cargo clippy && cargo clippy --profile=test --features="$Features" &&
             cd ../safe_app && cargo clippy && cargo clippy --profile=test --features="$Features" &&