Implement eval command via nodetool
Merge pull request #372 from robertoaloi/eval

Implement eval command via nodetool
Skip check for ebin directory when building edoc

edoc target fails if ebin directory does not exist.
ebin directory is not necessary for building edoc.
Skip check that ebin directory exist.
Merge pull request #376 from irpab/edoc_without_ebin

Remove check adding ebin to path for edoc target