Build 0.3.5 (07/31/2015)

A small patch that fixes some of the "spike-and-platform" issues. Full list of changes:

• Added a hint on level I-6

• Slight changes in spike placement and platform length (in order to make some places slightly more forgiving) on levels: I-4, I-5, II-9

• Slightly increased the delay of several lasers on level III-20

• Updated "dev time" on level I-20

• Slightly reduced polycount on every level of stages 1 and 2

• Significantly reduced polycount of the first stage background decorations

• Some decorations in stage 1 are now static. This should increase performance on low-end and integrated video cards.