added the code to download android.exe and mkTop.bin.gz from buildbot

Change-Id: I44d3058a7575a1e535b14e085d304d50681228bf
cleaned up output from run.zedboard

Change-Id: If6e5aae7f6b1e3ca36ee6dfc787f32077b66f7dc
added AdbCommands.StreamingShell()

Change-Id: I8876edc73225bb8c00708aa7f8379ec27be38d14
print out each line of output from android.exe as it is received

Change-Id: Ie93b8370ba77c1de5b523caaba637c0082935a0f