Added .gitignore (ignore vim swapfiles and /.gradle)
Initial, incomplete implementation of support for Mekanism gases (#36)
Handle tank.getGas returning null
Set autoHopToInside as appropriate when receiving gases
Don't receieve gases if machine has never been entered
Extend GasTank to allow notification of contents change to call setDirty
Changed default gas cooldown to 0 to match native pressurised tube transfer rate
Addded mekanism API stubs to build.gradle
Added MEK_AVAILABLE flag to Reference
Call setDirty upon receieving gas
Push gas id(s) and amount(s) to client to render GUI (actual GUI rendering TBD)
Added some comments (to be reviewed) detailing points of uncertainty
Implemented display of gas contents in GUI
Added build directory to .gitignore
Fix NPE that when attempting to draw gas from empty buffer
Added notes for remaining gas related tasks yet to be done
Only draw half-width fluid/gas bar if a buffer contains both
Added gas details to IGW documentation
Fix crash upon viewing GUI when Mekanism isn't installed
Removed TODO-gas