README.md in embulk-output-s3v2-0.2.0 vs README.md in embulk-output-s3v2-0.2.1

@@ -11,11 +11,11 @@
 - Resume supported: no
 - Cleanup supported: yes, but development in progress
 
 ## Configuration
 - **region**: AWS region name. (string, required)
-- **enable_profile**: If true, AWS credentials profile will be used when authenticating AWS. (boolean, default: `false`)
+- **enable_profile**: If true, AWS credentials profile will be used when authenticating AWS. If false, IamRole will be used. (boolean, default: `false`)
   - Supported in v0.2.0 or later
 - **profile**: AWS credentials profile name. If `enable_profile` is false, this parameter will be ignored. (string, default: `default`)
   - Supported in v0.2.0 or later
 - **bucket**: S3 bucket name. (string, required)
 - **object_key_prefix**: Prefix of S3 Objects key name. (string, required)
@@ -25,21 +25,22 @@
 - **multipart_chunksize**: Once the operation have decided to use multipart operation, the file will be divided into chunks specified this parameter. If `enable_multi_part_upload` is false, this parameter will be ignored. (string, default: `8MB`)
   - Minimum size: `5MB`
   - Maximum size: `2GB`
   - Enable semantics
     - Same as that of `multipart_threshold`
-- **multipart_threshold**: If `enable_multi_part_upload` is false, this parameter will be ignored. (string, default: `8MB`)
+- **multipart_threshold**: The size threshold the plugin uses for multipart transfers of individual divided bulk-data. If `enable_multi_part_upload` is false, this parameter will be ignored. (string, default: `8MB`)
   - Enable semantics
     - `KB`
     - `MB`
     - `GB`
     - `TB`
 - **extension**: File extension. (string, required)
 - **enable_temp_file_output**: If true, temp file will be created in `temp_path` directory. If false, bulk data will be treated on only buffer. (boolean, default: `true`)
 - **temp_path**: Directory for temp file output. (string, default: `/tmp`)
 - **temp_file_prefix**: Prefix of temp file name. (string, default: `embulk-output-s3v2`)
 ### Example
+#### Basic sample with IAMRole authentication
 ```yaml
 out:
   type: s3v2
   region: ap-northeast-1
   bucket: s3-bucket-name
@@ -47,9 +48,43 @@
   temp_path: /tmp
   extension: .csv
   formatter:
     type: csv
     delimeter: ","
+```
+#### Basic sample with Credentials-Profile authentication
+```yaml
+out:
+  type: s3v2
+  region: ap-northeast-1
+  bucket: s3-bucket-name
+  object_key_prefix: embulk/embulk-output-s3v2
+  temp_path: /tmp
+  enable_profile: true
+  profile: default
+  extension: .csv
+  formatter:
+    type: csv
+    delimeter: ","
+```
+#### Multipart Upload Sample with gzip encode
+```yaml
+out:
+  type: s3v2
+  region: ap-northeast-1
+  bucket: s3-bucket-name
+  object_key_prefix: embulk/embulk-output-s3v2
+  temp_path: /tmp
+  enable_multi_part_upload: true
+  multipart_chunksize: 10MB
+  max_concurrent_requests: 20
+  extension: csv.gz
+  formatter:
+    type: csv
+    delimeter: ","
+  encoders:
+  - type: gzip
+    level: 1
 ```
 
 ## Usage
 ### Build
 ```