Recompile all erl files on hrl file modification
Allow explicitly listed modules
Merge branch 'igaray.modules_regex' of git://github.com/igaray/erlang.mk
Merge branch 'recompile_erl_on_hrl_change' of git://github.com/crownedgrouse/erlang.mk

Extra changes include:

 *  Not running the target if the ebin/ directory does not exist
 *  Moved the target in the appropriate section in the file
Additional instructions for sending patches
Silence erlc-include target when include/ is missing