Modify documentation for new build process
build_config gets more flexibility
Add diagram for new build process
Beautify the graphs in the compilation documentation
Export build flags to lib/libmruby.flags.mak
Fix Visual Studio Toolchain
Reduce line length
fix build faild on Cygwin Environment
Fixed 1.8 compatibilitywq
make minirake respect verbose and set verbose to false by default
Set default rake to not verbose
Beautify the output of rake
Merge pull request #761 from bovi/beautify-build

Beautify build process output
resolve conflicts
Merge pull request #757 from bovi/compile-doc

Adapt Compile Documentation to improved Build process
vs2012 toolchain: various fixes

CC: / instead of - (cosmetic change)
LD: removed default libraries and fixed options syntax
AR: added /nologo
Merge pull request #759 from skandhas/pr-fix-build-on-cygwin

fix build faild on Cygwin Environment
Merge pull request #760 from masuidrive/fixed_compat

Fixed 1.8 compatibility
Merge pull request #762 from cremno/vs2012-toolchain-fixes

vs2012 toolchain: various fixes