Showing raised cosine and FFT.

Raised cosine is displayed in an interactive JavaFX GUI. The beta
value can be dyanmically adjusted from 0 to 1 and an FFT displays
the spectral impact to the most recent adjustment.
A low-pass filter can replace the raised cosine FIR filter to show
the difference between the two.

.gitignore

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+# Maven target directory
+/target/
+
+# Compiled class files
+*.class
+
+# Log files
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# Virtual machine crash logs
+hs_err_pid*
+
+# Maven specific files
+dependency-reduced-pom.xml
+release.properties
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+# Avoid Mac specific files
+.DS_Store
+
+# Avoid Linux/Unix specific files
+*~
+
+# Avoid Windows specific files
+Thumbs.db