Update low-level touchscreen reading hints

See merge request !304

Resolve "Expand on display cable fix"

Closes #97

See merge request !300

Merge branch '79-document-how-to-look-for-phosh-crash-issues-or-crash-issues-in-general-2' into 'master'

Resolve "Document how to look for phosh crash issues (or crash issues in general)"

Closes #79

See merge request !301

Resolve "Explain wifi setup"

Closes #122

See merge request !302

Add a link the UART header information

See merge request !303

Fix "ephiphany" typo

See merge request !299

Add warning about battery orientation

See merge request !298

Update information about simple I/O devices

See merge request !297

Resolve "Package-build infrastructure needs documentation"

Closes #124

See merge request !294

Update available screen area constraints

See merge request !295

Make corrections as suggested in !285

See merge request !293

Update battery requirements

See merge request !292

Update battery requirements

See merge request !291

Add basic tests for verifying data connectivity

See merge request !285

Fixed heading levels in the Pictures example docs

See merge request !290

Update information about devkit peripheral software interfaces

See merge request !289