Merge branch 'maint'
uhd: fix get_xx_freq_range to use analog bw/2
The proper equation should be:
max_freq = max_lo + min(adc/2, bw/2) - sr/2
uhd: added virtual destructors for several interface classes
Added CMake variables to customize builds to match Debian package configurations
usrp: mboard eeprom map use string as key
Examples - Test Daughterboard Coercion: moves across the frequency and gain ranges of a daughterboard and tests whether or not it can tune/lock at all advertised frequencies and gains
include: updated multi_usrp's help descriptions for USRP info functions
master: Fixing comments that say SPI is LSB.
lib: corrected multi_usrp docs
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