Modify documents about overview

Add overview about apigateway and tosca2heat.

Change-Id: I2994ebcde39dcacd248bd09d33ab48823c12e9a1
Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

4 files changed, 28 insertions, 174 deletions

diff --git a/apigateway/LICENSE b/apigateway/LICENSE
index 67db858..f4346f8 100644
--- a/apigateway/LICENSE
+++ b/apigateway/LICENSE
@@ -1,175 +1,13 @@
+Copyright 2015 Open Platform for NFV Project, Inc. and its contributors
 
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diff --git a/docs/developer/design/tosca2heat.rst b/docs/developer/design/tosca2heat.rst
index 3fb1d26..e49718e 100644
--- a/docs/developer/design/tosca2heat.rst
+++ b/docs/developer/design/tosca2heat.rst
@@ -5,3 +5,15 @@
 Parser tosca2heat
 =================
 
+Tosca2heat is a opnfv sub-project of parser based on openstack two projects: tosca
+parser and heat translator.
+
+The TOSCA Parser is developed to parse TOSCA Simple Profile in YAML. It reads the
+TOSCA templates and creates an in-memory graph of TOSCA nodes and their relationship.
+Heat-Translator is a command line tool which takes non-Heat templates as an input
+and produces a Heat Orchestration Template (HOT) which can be deployed by Heat.
+
+More details please refer to openstack related sites.
+
+Tosca2heat intends to enhanced NFV features in tosca template parse and translator,
+such as huge page, dpdk and sriov.
diff --git a/docs/developer/overview/overview.rst b/docs/developer/overview/overview.rst
index 3ae173a..0a6e9bb 100644
--- a/docs/developer/overview/overview.rst
+++ b/docs/developer/overview/overview.rst
@@ -104,6 +104,10 @@ For Danube Release, Parser offers the following additional capabilities:
   Satisfiability Modulo Theories (SMT) and the general-purpose SMT solver Z3. It includes a
   library of network function models.
 
+* New module apigateway added, which focuses on message relay and provides unified restful API
+  and grpc api to end  user who want use parser, additionally one module of parser(such as
+  yang2tosca) can access the other module(such as tosca2heat) through grpc provided by apigateway
+  without concern its location.
+
 * The tosca2heat module updated with the intgeration of OpenStack tosca-parser and heat-translator
   0.7.0 releases.
-
diff --git a/docs/release/installation/installation.instruction.rst b/docs/release/installation/installation.instruction.rst
index ae2cbb1..323fd4a 100644
--- a/docs/release/installation/installation.instruction.rst
+++ b/docs/release/installation/installation.instruction.rst
@@ -162,4 +162,4 @@ Step 2: Install the apigateway submodule.
     python setup.py install
 
 **Notes**: In release D, apigateway submodule is only initial framework code, and more feature will
-be provided in the next release.
\ No newline at end of file
+be provided in the next release.