Adding CircleCI build

.gitignore

@@ -3,3 +3,4 @@
 *~
 *-
 TimeWindowCompactionStrategy/target/
+target/

.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1 @@
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.3.3/apache-maven-3.3.3-bin.zip

circle.yml

@@ -0,0 +1,35 @@
+machine:
+  java:
+    version:
+      oraclejdk8
+
+  environment:
+    MAX_HEAP_SIZE: 512M
+    HEAP_NEWSIZE: 128M
+
+dependencies:
+  override:
+    - ./mvnw compile
+
+  cache_directories:
+
+test:
+  override:
+    - ./mvnw test
+
+deployment:
+    cassandra-2.0:
+        branch: cassandra-2.0
+        commands:
+            - ./mvnw package
+            - ./mvnw -s conf/settings.xml deploy
+    cassandra-2.1:
+        branch: cassandra-2.1
+        commands:
+            - ./mvnw package
+            - ./mvnw -s conf/settings.xml deploy
+    cassandra-2.2:
+        branch: cassandra-2.2
+        commands:
+            - ./mvnw package
+            - ./mvnw -s conf/settings.xml deploy

conf/settings.xml

@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Maven settings needed for circle ci build -->
+<settings xsi:schemaLocation='http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd'
+          xmlns='http://maven.apache.org/SETTINGS/1.0.0' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
+		  <servers>
+				<server>
+					<id>bintray-repo-twcs</id> 
+					<username>${env.BINTRAY_USERNAME}</username>
+					<password>${env.BINTRAY_PASSWORD}</password>
+				</server>
+			</servers>
+</settings>