iOS sample

Signed-off-by: rainfiel <rainfiel@gmail.com>
fix xcodeproj error
particle example (examples/ex03.lua)
ex03 support mingw/posix
support scissor and pannel
fix shader compile error in MACOSX.
rename scissor to ex04
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
simplify ex03
Merge pull request #16 from Tsiannian/master

fix shader compile error in MACOSX.
fix typo (macosx)
make particle config data independent
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
add scissor to compile list
avoid warning
fix particle color error
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
avoid warning
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d