Merge branch '1-setup-ci' into 'master'

Resolve "Setup CI"

Closes #1

See merge request !1

.gitlab-ci.yml

+image: php:5.6
+
+before_script:
+- bash ci/docker_install.sh > /dev/null
+
+test:php-lint:
+  script:
+  - bash ci/phplint.sh ./
\ No newline at end of file

ci/docker_install.sh

+#!/bin/bash
+
+# We need to install dependencies only for Docker
+[[ ! -e /.dockerenv ]] && exit 0
+
+set -xe
+
+# Install git (the php image doesn't have it) which is required by composer
+apt-get update -yqq
+apt-get install git -yqq
+
+# Install phpunit, the tool that we will use for testing
+curl --location --output /usr/local/bin/phpunit https://phar.phpunit.de/phpunit.phar
+chmod +x /usr/local/bin/phpunit
+
+# Install mysql driver
+# Here you can install any other extension that you need
+docker-php-ext-install pdo_mysql
\ No newline at end of file

ci/phplint.sh

+#!/bin/bash
+#Usage: `phplint.sh /path/to/dir` or `phplint.sh /path/to/file.php`
+
+error=false
+
+while test $# -gt 0; do
+    current=$1
+    shift
+
+    if [ ! -d $current ] && [ ! -f $current ] ; then
+        echo "Invalid directory or file: $current"
+        error=true
+
+        continue
+    fi
+
+    for file in `find $current -type f -name "*.php"` ; do
+        RESULTS=`php -l $file`
+
+        if [ "$RESULTS" != "No syntax errors detected in $file" ] ; then
+            echo $RESULTS
+            error=true
+        fi
+    done
+done
+
+
+if [ "$error" = true ] ; then
+    exit 1
+else
+    exit 0
+fi
\ No newline at end of file