Fully fixed decoding, added Test.java and Shell build script

resources/readme.txt

@@ -1,4 +1,4 @@
 background.png taken from the Internet, resized and darkened
+
 mdisk.ico taken from https://github.com/9214/daruma, I sent an email asking for
-this icon, at the moment of writing this, author still not answered, but the license is
-WTFPL, so I think it is OK to take this icon.
+this icon. Author permitted me to use it.

resources/test_data.txt

@@ -0,0 +1,101 @@
+8a1\wyRVK1L8Z2kZ
+o?d\w3R1e1KQVSiP
+\tH5Wc8m+Vtk8QWR
+8AvLKYqyb5tQJi7h
+uCc1FQWyGWdR?tcZ
+6!VPg?UQ?RZyhh/a
+MquDCP+Tbz+sJHvv
+Eg\Fc?AWH4z9\Z77
+\vSJr\hCU7z8R1h!
+/1\Hs!UQhcSkx4LN
+u6ajbPxQY3SpgW9N
+eov8WRNHZ1ckhQWe
+uQBGJs4HF4typCNQ
+mLT+6ZXy4di?Rkk9
+o\EFd\718zx9tmES
+MSG5P&uXAdcsXRnA
+uQBGJs4HV4NyDTNQ
+E+\qjfLyLb\qxAvB
+mRV4UmUWV?PWZaUJ
+6d&ZM6b&/3T/rQMA
+/S9UcnkyMWs1Hw8i
+gbN9E3pEsz/51aEF
+uCc1FQWyWW9B8sdZ
+mLT+6ZXyYdi?Rsk9
+oKMEd\71MzR9PvES
+MquDKP+Tbz+s+HvP
+2SBkhhaEs8oZBRHk
+8a1\wyRVK1L8Z?kY
+c8HYkktToXdusKSL
+6d&ZM6b&13T/pcMA
+MquDKP+TLzosJGrv
+8AvLKYqyb5tQLq7h
+EXB\BhaWF6+CAHN/
+Wm\gH3VwXcA4epd8
+mRV4UmUSE6vW5XUJ
+kEdUmH/i8QuVx18b
+E+\qjfL2Pb\qwKvA
+2SJkhhaE84+ZhQnk
+Um\gH3VwHcg414dc
+WZu&E8HwdWxkawqs
+uCc1FQWymWdR?&dZ
+?6Stp\&TQfHqStzE
+u6ajbPxU+zypAf9N
+8a1\wyRFa1r849k5
+/1\Hs!UUhcSkwwLt
+mRV4UmUWU?PWYW/J
+2S9UUnkyMWs1G/8C
+mLT+6ZXy4di?Rs&9
+aQ/Pp3WxEf+Kj9wb
+MSG4f&uXAdcsVZmA
+MtH5ec8mYVNkWBWR
+6d&ZM6bh&zz/KdsA
+\vSJr\hWA7T858hf
+o?d\w3Rxf1KQXeiP
+6!VPo?UQuR5yJ/w6
+\tH5ec8m+VtkXESx
+oKMFN\71czxtNuES
+8AvLaYqyL5NAJr6h
+MquDKP+Tbz+sLDvP
+2SBkhhaEs8oZAVHk
+/1\Hs!UA1cykRzLM
+8ot1?L!V+ZSTkMAy
+6dtZM6bh1zT/KYMA
+MquDKP+TLzos+Crv
+EXBPBhaWV6oSAGN/
+WZu&E8HwtWR/Yxrs
+Wm\gH3VwXcA4ftd8
+mRV4UmUSE6vW4TUJ
+\vSJr\hGQ7z8Y9h!
+E+\qjfL2Lb\qxKvB
+2SJkhhaE84+ZgUnk
+Um\gH3VwHcg4esZc
+uCc/FQWy2W9B8kdZ
+uCc/FQWymWdB?&dZ
+?6Stp\&TQfHqTpzE
+o?d\w3R1PxqQ3fCP
+eov8WRNDJx8kAdWe
+/1\Hs!UU&cSkxwLt
+mRV4UmUWU?PWbS/J
+?6Stp\&TAfnq74zk
+aQ/\53WxUfoah8wb
+aQ/\p3WxEf+aj9wb
+MSG5f&uXAdc8XZmA
+ibN9M3pE8zU5dLE&
+EomojKLQr7vCdbp/
+\vSJr\hSE7T84UhW
+o?d\w3Rxf1KQWSiG
+eon8WRNDZxckAQ2X
+gbN9E3pEsz/5cuQF
+qKMEd\71c3x9PmES
+?AvKaYqyL9NQJj6h
+sQBGJs4HV4NyBzdQ
+EgGFc?ASG4z9MZ7y
+/1\Hs!UExcykQbLF
+8ot1?L!VMZST&kA6
+EouojKLQ77PCdWJ9
+MquDCP+TLzosLm7v
+GXB\BhaWV?oCA\N/
+UZukU8HwtSRka5rs
+/S9UcnkycWM1&FoC
+fCe\w9!iBXJ1ijn&