Southern hemisphere fixes (#27)

Fix ecliptic positioning of sun, moon, and planets in southern hemisphere sky.

New option to step one sidereal day at a time (instead of 24 hours at…

… a time)...

* New option to step one sidereal day at a time (instead of 24 hours at a time) during high-speed animation.
* Auto-repeat on backward/forward event buttons.
* Improved event messages.

Fix AppleWebKit detection problem.

Browser detection improvements (#22)

Improved detection of incompatible web browsers.

Improved incompatible browser detection (#21)

* Moved fonts to data URLs to prevent font flicker.
* Improve incompatible browser checking and related feedback.

Removed WebGL requirment, etc. (#20)

* Removed WebGL requirement to run.
* Provided slower but functional 2D-graphics fallback for rendering globe maps when WebGL is unavailable.
* Improved browser compatibility checking, with specific Chrome, Firefox, and Safari minimum version requirements.

Added ability to open info display from collapsed control panel, iPad…

… fixes, more (#19)

* Added ability to open info display from collapsed control panel.
* Remove feature for displaying equatorial position - confusing, and not as useful as I thought.
* Fix iOS keyboard input bug.
* Enable "Suppress onscreen keyboard" option even when iOS is requesting a desktop version of the website.

Bump version number. (#18)

* Add new "Sun constrained by hour hand".
* Fix improper handling of Local Mean Time setting.

Fix language submenu positioning for small mobile screens. (#16)

Android improvements, incompatible browser detection. (#15)

* Improved Android phone browser performances.
* Add incompatible web browser detection.