define and export LCC_ENABLE_CHIPMUNK_INTEGRATION for extensions anroid project
Merge pull request #2863 from dumganhar/master

Adding travis-ci build for emscripten port.
copy lua script when creating a project by create-android-project.sh
Merge pull request #2864 from minggo/master

make create-android-project.sh work ok
fixed #2259:add description of path that custom font can put in
Merge pull request #2865 from minggo/master

add description of path that custom font can put in
update changelog [ti ignore]
Merge pull request #2866 from minggo/master

update changelog
[travis-ci] Speed up android build.