Change the minimum version of required perl into 5.10.1 from 5.12.
Better support for linux

I made it not solve a Dependencies in principle in Linux.
I leave a Fix of a Dependencies to the package manager of operating system.
Add message for failure to build.

At Linux or BSD、I change into the error message in consideration of a possibility that the Software which depends is not installed.
Add 'LANG=C;' to each commands.

Since there is a Software in which an install fails if it is not LANG=C, I add uniformly.

e.g. vim, Groff
Better linux support for tree.
Integrate TEST_REQUIRES to PREREQ.
Fix typo.
test_requires to requires.
Except OS X, I correct so that the test of Dependencies may not be performed.
Move http access test.
Fix Git definition.
Disable tcl for Git.
Exit temp dir at each test.
Move test files.

Move a test with a HTTP communication to xt directory.
Merge branch 'devel' of https://github.com/magnolia-k/Enbld into devel
Add support for gmake at BSD.
Refactor
Fix definition modules for new command mechanism.
Fix choose make commnad logic.
Add BLACKLIST for File::Fetch at setup command.

Since LWP takes out a certificate error with OS X.