Merge pull request #79 from ruebot/7.x

Addressing issue raised here https://github.com/Islandora/islandora_solr...
Detects Windows using 'islandora_os_check' (pending in islandora.module file); updates command line call to LAME.
ISLANDORA-81 Ensured all comments were 80 characters or less.
ISLANDORA-81 OS-check function renamed/moved; adjusted code accordingly.
ISLANDORA-81 OS-check function merged (#450). Travis CI should now pass.
ISLANDORA-81 Replaced single-quotes w/doubles. OS-check no longer needed.
ISLANDORA-81 Removed complex syntax from  string.
ISLANDORA-81 Travis CI passed, then mysteriously failed. Retrigger.
ISLANDORA-81 Retrigger Travis CI.
Merge pull request #81 from slangerx/7.x

Windows-compatibility: Calling LAME through the command line
README Normalization