Added GetUnicodeRange()

This function returns a const sUnicodeRange&
for a given E_UNICODE_TABLE.
Moved g_unicodeRanges definition to unicode.cpp

This way the g_unicodeRanges array will not be copied into
every translation unit.
GetUnicodeRange() is now inline
Merge branch 'master' of github.com:TheSatoshiChiba/glfnt