Image stuff (#77)

Features
---------
Image to PDF supports multiple images, stretching and auto rotation
File inputs now only search for wanted file type
Settings now has a zip range so it can zip if you have more than x downloads (default 4)

extras
---------
DevTools support for easier development
Fix for temporary files for thread safety

src/main/resources/messages_en_US.properties

@@ -4,10 +4,10 @@
 # the direction that the language is written (ltr = left to right, rtl = right to left)
 language.direction=ltr
 
-pdfPrompt=Choose PDF
-multiPdfPrompt=Choose PDFs (2+)
+pdfPrompt=Select PDF(s)
+multiPdfPrompt=Select PDFs (2+)
 multiPdfDropPrompt=Select (or drag & drop) all PDFs you require
-imgPrompt=Choose Image
+imgPrompt=Select Image(s)
 genericSubmit=Submit
 processTimeWarning=Warning: This process can take up to a minute depending on file-size
 pageOrderPrompt=Page Order (Enter a comma-separated list of page numbers) :
@@ -91,7 +91,7 @@ settings.downloadOption.title=Choose download option (For single file non zip do
 settings.downloadOption.1=Open in same window
 settings.downloadOption.2=Open in new window
 settings.downloadOption.3=Download file
-settings.zip=Zip multi-download files
+settings.zipThreshold=Zip files when the number of downloaded files exceeds
 
 #OCR
 ocr.title=OCR
@@ -180,6 +180,11 @@ split.submit=Split
 imageToPDF.title=Image to PDF
 imageToPDF.header=Image to PDF
 imageToPDF.submit=Convert
+imageToPDF.selectText.1=Stretch to fit
+imageToPDF.selectText.2=Auto rotate PDF
+imageToPDF.selectText.3=Multi file logic (Only enabled if working with multiple images)
+imageToPDF.selectText.4=Merge into single PDF
+imageToPDF.selectText.5=Convert to separate PDFs
 
 #pdfToImage
 pdfToImage.title=PDF to Image