Merge branch 'developer' into 'master'

PromptSearch.js change design

icon, text style -> change color
각 슬라이드별 icon change

See merge request !2

@@ -15,7 +15,7 @@ const FirstSlide = () => (
 )
 const SecondSlide = () => (
     <View style={styles.slide2} >
-        <Icon name='search' style={styles.icon} size={50} />
+        <Icon name='question' style={styles.icon} size={50} />
         <Text style={styles.text}>길잡이가 수정한</Text>
         <Text style={styles.text}>검색 문장을 확인하세요</Text>
         <Text style={styles.subtext}>길잡이는 항상 최적의</Text>
@@ -24,7 +24,7 @@ const SecondSlide = () => (
 )
 const ThirdSlide = () => (
     <View style={styles.slide3} >
-        <Icon name='search' style={styles.icon} size={50} />
+        <Icon name='bar-chart' style={styles.icon} size={50} />
         <Text style={styles.text}>검색 점수와 그래프로</Text>
         <Text style={styles.text}>검색능력을 체크하세요</Text>
         <Text style={styles.subtext}>길잡이는 당신의</Text>
@@ -33,10 +33,9 @@ const ThirdSlide = () => (
 )
 const LastSlide = () => (
     <View style={styles.slide4} >
-        <Icon name='search' style={styles.icon} size={50} />
         <Text style={styles.text}>내 손 안의 검색 도우미</Text>
         <Text style={styles.text}>길잡이에서</Text>
-        <Text style={styles.text}>검색을 시작하세요</Text>
+        <Text style={styles.subtext}>검색을 시작하세요!</Text>
     </View>
 )
 
@@ -69,11 +68,11 @@ const styles = StyleSheet.create({
         marginBottom: 10,
         fontSize: 30,
         fontWeight: 'bold',
-        color:'#999999',
+        color:'#696969',
     },
     icon: {
         marginBottom: 20,
-        color: '#999999'
+        color: '#696969'
     },
     subtext:{
         marginBottom: 10,