SINGA-480 Update documentations

update installation instructions;
move the instructions on building from source into build.md

Author: nudles

CMakeLists.txt

@@ -19,9 +19,9 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(singa)
-SET(PACKAGE_VERSION "2.0.0")
+SET(PACKAGE_VERSION "2.1.0")
 SET(SINGA_MAJOR_VERSION 2)  # 0 -
-SET(SINGA_MINOR_VERSION 0)  # 0 - 9
+SET(SINGA_MINOR_VERSION 1)  # 0 - 9
 SET(SINGA_PATCH_VERSION 0)  # 0 - 99
 MATH(EXPR SINGA_VERSION "${SINGA_MAJOR_VERSION} * 1000 + ${SINGA_MINOR_VERSION} * 100 + ${SINGA_PATCH_VERSION}")