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/1.25.12' into stable
updated rails express patches to fix missing c-return event for Module#const_missing
Merge pull request #2500 from skaes/fix-missing-c-return-events

updated rails express patches to fix missing c-return event
reset rvm_archive_flag so archive file is removed one time only
fix detecting binary rubies already available packages
Merge branch 'master' of github.com:wayneeseguin/rvm
remove internal use of rvm in rvm