Pin version of CI scripts to 1.0.0 (#50)

Don't clone from master to avoid breaking the builds when the scripts
update.

.appveyor.yml

@@ -31,7 +31,7 @@ install:
     - ps: mkdir -p ~\.harmonica\data\master
     - ps: cp data\* ~\.harmonica\data\master
     # Get the Fatiando CI scripts
-    - cmd: git clone https://github.com/fatiando/continuous-integration.git
+    - cmd: git clone --branch=1.0.0 --depth=1 https://github.com/fatiando/continuous-integration.git
     # Setup miniconda and install the requirements into a new environment
     - cmd: continuous-integration\appveyor\setup-miniconda.bat
     # Activate the new environment

.travis.yml

@@ -86,7 +86,7 @@ before_install:
     - mkdir -p $HOME/.harmonica/data/master
     - cp -r data/* $HOME/.harmonica/data/master
     # Get the Fatiando CI scripts
-    - git clone https://github.com/fatiando/continuous-integration.git
+    - git clone --branch=1.0.0 --depth=1 https://github.com/fatiando/continuous-integration.git
     # Download and install miniconda and setup dependencies
     # Need to source the script to set the PATH variable globaly
     - source continuous-integration/travis/setup-miniconda.sh