solution for issue #91
added Spanish language component
removed unnecessary files
added Spanish module in main pom.xml
add marytts-lang-es as a dependency in assembly plugin (as stated in: https://github.com/marytts/marytts/wiki/New-Language-Support)
fix a possible array-out-of-bounds condition.

if the complete array given to interpolateNonZeroValues consists of zeros,
then findNextIndexNonZero immediately returns -1, the j-counter starts at i=0,
and countour[j-1] is the -1'th index -> FAIL.
This fix adds a ?-expression to ascertain that j never starts below 1.
Merge remote-tracking branch 'marcela/marytts-es' into incrementalityChangesTake2

Conflicts:
	marytts-assembly/assembly-runtime/pom.xml
	marytts-builder/src/main/resources/marytts/tools/voiceimport/templates/pom.xml
	pom.xml