Revert "Bug 25752: sourceType is redundant as constraint"

This reverts commit 71f3030cdd686f84bd6decb895d2196c13092bcd.
Revert "Bug 26243: Do we need getUserMedia() on MediaDevices?"

This reverts commit 30c1812084ceee87761f2ee4af9a123b0a604ec6.
Revert "prepped change log for next version" (We're back at 20140817 published version)

This reverts commit 394adcffe6bc6a9fc3c59d18f2256f2d125c3bd3.
Added missing images.