Firstly, `Step.duration_remaining` casts it to u32, unnecesarily
limiting it to 2^32. While theoretically this is "good enough" (at 3
seconds steps it provides room for a little over 400 years), it is
still a lossy way to calculate the remaining time until the next step.
Secondly, step duration might be zero, triggering division by zero
in `Step.calibrate`
Solution: rework the code around the fact that duration is
typically in single digits and never grows, hence, it can be represented
by a much narrower range (u16) and this highlights the fact that
multiplying u64 by u16 will only result in an overflow in even further
future, at which point we should panic informatively (if anybody's
still around)
Similarly, panic when it is detected that incrementing the step
counter wrapped around on the overflow of usize.
As for the division by zero, prevent it by making zero an invalid
value for step duration. This will make AuRa log the constraint
mismatch and panic (after all, what purpose would zero step duration
serve? it makes no sense within the definition of the protocol,
as finality can only be achieved as per the specification
if messages are received within the step duration, which would violate
the speed of light and other physical laws in this case).
This key is not recognized by some software
(like carnix).
It is also not documented in http://doc.crates.io/manifest.html
Solution: rename this key to [package]
* Inject Parity script to all HTML dapps pages
* Small glitch
* Add injection test
* Add Special GHH commit value for serving ZIP files as DAPPS
* Refactor GithubDapp fetcher
* PR Grumbles
* Purify dappCard style
* Add support for pinning apps
* Add a section to show pinned apps
* Cleaner code
* Bump dependency versions
* Small tweaks
* Avoid double scrollbars
* Small style updates
* Bump parity/shared version
Lots of people are having trouble building from source and keep up to date. The main reason seems to be that cargo/rustup is hard to work with. The 'abort' panic strategy error is very frustrating and seems to be solved 100% of time with a clean.
Adding those lines:
When compiling a crate if you receive this error:
```
error: the crate is compiled with the panic strategy `abort` which is incompatible with this crate's strategy of `unwind`
```
Cleaning the repository will most likely solve the issue, try:
```
cargo clean
```
