docs: correct dreamview port number etc.

- correct dreamview port number
- fix MarkDown syntax
- add doc indexes for Apollo 2.5 quick start

docs/quickstart/README.md

 # Quick Start Guides
 
+## Apollo 2.5
+
+- [apollo 2.5 quick start](apollo_2_5_quick_start.md)
+- [apollo 2.5 quick start cn](apollo_2_5_quick_start_cn.md)
+
 ## Apollo 2.0
 
 - [Apollo 2.0 quick start](apollo_2_0_quick_start.md)

docs/quickstart/apollo_2_0_hardware_system_installation_guide_v1.md

@@ -37,7 +37,7 @@
 
 # About This Guide
 
-The *Apollo 2.0 Hardware and System Installation Guide* provides the instructions to install all of the hardware components and system software for the **Apollo Project **. The system installation information included pertains to the procedures to download and install the Apollo Linux Kernel.
+The *Apollo 2.0 Hardware and System Installation Guide* provides the instructions to install all of the hardware components and system software for the **Apollo Project**. The system installation information included pertains to the procedures to download and install the Apollo Linux Kernel.
 
 ## Document Conventions
 
@@ -207,7 +207,7 @@ For more information about the NovAtel SPAN ProPak6 and the IMU-IGM-A1, see:
 
 The GPS Receiver/Antenna used with the GPS-IMU component is the **NovAtel GPS-703-GGG-HV**.
 
-**NOTE: **The GPS NovAtelGPS-703-GGG-HV works with either model of the two GPS-IMU options that are described in the previous section, Global Positioning System (GPS) and Inertial Measurement Unit (IMU).
+**NOTE:**The GPS NovAtelGPS-703-GGG-HV works with either model of the two GPS-IMU options that are described in the previous section, Global Positioning System (GPS) and Inertial Measurement Unit (IMU).
 
 ![gps_receiver](images/gps_receiver.png)
 

docs/quickstart/apollo_2_5_quick_start_cn.md

@@ -14,7 +14,7 @@
 
 1. 启动DreamView
 
-   打开浏览器（譬如Chrome）然后在地址栏输入**localhost:8887**来启动Apollo Dreamview。
+   打开浏览器（譬如Chrome）然后在地址栏输入**http://localhost:8888**来启动Apollo Dreamview。
 
    ![](images/dreamview_2_5.png)