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
Merge branch 'hotfix/1.25.6' into stable
disbale tcl/tk on cygwin
Merge branch 'master' into features/cygwin
ruby-2.1.0
Merge branch 'master' of github.com:wayneeseguin/rvm

Conflicts:
	config/db
make 2.1.0 default for ruby
1.25.7
Merge branch 'master' into hotfix/1.25.7
Merge branch 'hotfix/1.25.7' into stable
Merge branch 'hotfix/1.25.7'
improved logging for migrating aliases