Fixes issue causing the edition mode to be off when editing more than ~3 lines of text. Also fixes keyboard panning while editing.
Improves bottom margin containment calculations
Covers edge case when the bottom margin containment might consider the status bar height
Forces layout when begin/end text edition, to fix small auto-layout gaps
Fixes placeholder rectangle calculations. Fixes #79.
Removed dead code in SLKTextViewController

Fixes compiler warning "Code will never be executed"
Merge pull request #80 from fluidsonic/patch-3

Removes dead code in `detectExternalKeyboardInNotofocation:`
Makes sure text is cached on memory warning.
Considers status bar height changes, when calculating the bottom margin of the container
Merge branch 'master' of https://github.com/slackhq/SlackTextViewController