Contrast-Finder v0.9.0

Upgrade-o-meter: just replace the .war file and restart Tomcat

Thanks to:

• @ffoodd - Feature request #148
• @ArnaudDelafosse - Issue #136 and PR #143
• @davidjr82 - PR #157

New Features:

• #157 - i18n: added Spanish
• #148 - Contrast calculation is visible without scrolling)

Bug:

• #136 - Webapp: fixed pt => px conversion ("Help" > "Text size understanding")

Documentation:

• #136 - Fixed pt => px conversion ("Help" > "Text size understanding")