for cleaning .o and .d files generated by android demo
fix ios build error caused by expand_pic.cpp missing from project configuration
Merge pull request #913 from JuannyWang/ios_build_error

fix encoder ios build error caused by expand_pic.cpp missing from project config...
remove unused argument pBlock
Merge pull request #914 from licaiguo/remove-unused-args

remove unused argument pBlock
update decoder mac project for expand picture files position change
Merge pull request #915 from ruil2/expand_pic_1

update decoder mac project for expand picture files position change
Update common.xcodeproj to build successfully
Merge pull request #917 from KentoMoriwaki/fix/ios-demo-build

Update common.xcodeproj to build successfully
and space to colon, modify bad note
Merge pull request #918 from syureyi/de7621

for cleaning .o and .d files generated by android demo