Set patchlevel to alpha7
Adding a fluffos specific C++11 standard check.

Currently checks range based for loop. which is not supported on
g++ 4.4 (centos).
Fixed a unlikely issue discovered by coverity scan.
Merge pull request #133 from sunyc/master

Raise patchlevel to alpha7
Apply terminal_colour_replace bug.
Repair a bug in terminal_colour when apply terminal_colour_replace return a not color code string.