Added <concat-path> tag to concatenates rom path with directory#9

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fredbcode merged 2 commits intofredbcode:masterfrom

sergiobenrocha2:master

Mar 25, 2015

Commits on Mar 24, 2015

Added <concat-path> tag to concatenates rom path with directory (some emulators may need the full path instead cd /your/path/ & ./executable).
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Update README.
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