add minimal code to support cygwin
fix adding coma to packages list in requirements_cygwin_libs_install
improved detection of cygwin architecture, added missing packages make and gcc-core, fix calling installer depending on the platform
remove the falsy detection of cygwin platform
Merge branch 'master' into features/cygwin
Merge branch 'master' into features/cygwin
Merge branch 'master' into features/cygwin
improved logging in requirements_cygwin_libs_install
replace readline with cygwin32-readline on cygwin
disbale tcl/tk on cygwin
Merge branch 'master' into features/cygwin
use cygwin32-readline only on x86_64
Merge branch 'master' into features/cygwin
Merge branch 'hotfix/1.25.8' into stable
rbx-2.2.2 is the current version, fix #2483
Merge branch 'master' of github.com:wayneeseguin/rvm
add CC env patch to ruby-2.0.0-p353 on osx
fix compiling static ruby-2.1.0 on OSX
move the osx_static CC env patch for all rubies
take ZDOTDIR into account when searching for ZSH shell initialziation files, fix #2479