Dep/Jemalloc: Drop Jemalloc From Dep Folder

Signed-off-by: AriDEV <aridev666@gmail.com>
Cmake: Add Definition -std=c++11 For GCC Greater Then 4.7

Signed-off-by: AriDEV <aridev666@gmail.com>
Travis: Update Travis GCC to 4.8

Signed-off-by: AriDEV <aridev666@gmail.com>