added install.sh that will replace Makefile
using glob operator to get the applications
updated installation procedure
fixed commands_test
fixes on uninstall, Makefile used for tests only (as is handy)
Makfile up to date
fixed typo in README.md
added manifests, package and vcs structures to env package
added utilities to run commands, and updated cache.Compile
fixed build
finished Packages method in env package, wip
fixed wrong formats
fixed Packages method, added tests
added export command and tests, missing some pieces yet
os.Unsetenv is only present in go1.4, get rid of it on tests