resolve symlinks in local files

the tar libraries choke when checking valid
filenames because they don't resolve symlinks
Merge branch 'hotfix/1.0.2'
Merge pull request #245 from ptone/find-links-symlinks

resolve symlinks in local files
Merge branch 'release/1.1'
Merge branch 'release/1.2'
Merge branch 'release/1.2.1'
experimental support for installing wheel archives
use the constructed exename
wheel doc updates
Guard the chmod in case external_attr is 0.
remove pip channel notifications
set the travis branches
Add platform checks to wheel location code
Merge pull request #8 from pfmoore/wheel_install_platcheck

Add platform checks to wheel location code
'pip wheel'
'pip wheel' doesn't support py25
use CommandError
make sure bdist_wheel is available up front
Merge pull request #14 from dholth/wheel_build

make sure bdist_wheel is available up front
Merge pull request #12 from qwcode/wheel_build

'pip wheel'