#85 Replaced org.apache.commons.lang3.Validate with
com.google.common.base.Preconditions. Removed Apache Commons-Lang
dependency and migrated some necessary classes. HashCodeBuilder and
EqualsBuilder have been migrated also, as they cannot be replaced by
com.google.common.base.Objects.equal/hashcode.
Merge branch 'ApacheCommonsDependencyRemoval' of https://github.com/roberttaylor426/RoboBinding into ApacheCommonsDependencyRemoval
#85 Made modifications as per the feedback.