Merge pull request #38 from StephenHynes7/master

added correct exit code when already following a file
Added startup information for le follow, moved INSTALL to INSTALL.md due to mac filesystem issue
Merge pull request #40 from joeheung/startup_info

Added startup information for le follow
Adding filter debugging
Merge branch 'master' of github.com:logentries/le
added correct exit code for le follow